[BACKPORT] new replSetGetStatus output fields (#353)

* DOCS-14906 new replSetGetStatus output fields (#199)

* DOCS-14906 new replSetGetStatus ouput fields

* clarifies lastAppliedWallTime

* rewording

* tech review updates

* documents minor version in which these new fields were added

Author: jmd-mongo

source/reference/command/replSetGetStatus.txt

@@ -175,6 +175,8 @@ Example
                          "t" : NumberLong(3)
                       },
                       "optimeDate" : ISODate("2020-03-05T05:24:38Z"),
+                      "lastAppliedWallTime": ISODate("2020-03-05T05:24:38Z"),
+                      "lastDurableWallTime": ISODate("2020-03-05T05:24:38Z"),
                       "syncSourceHost" : "",
                       "syncSourceId" : -1,
                       "infoMessage" : "",
@@ -202,6 +204,8 @@ Example
                       },
                       "optimeDate" : ISODate("2020-03-05T05:24:38Z"),
                       "optimeDurableDate" : ISODate("2020-03-05T05:24:38Z"),
+                      "lastAppliedWallTime": ISODate("2020-03-05T05:24:38Z"),
+                      "lastDurableWallTime": ISODate("2020-03-05T05:24:38Z"),
                       "lastHeartbeat" : ISODate("2020-03-05T05:24:44.114Z"),
                       "lastHeartbeatRecv" : ISODate("2020-03-05T05:24:43.999Z"),
                       "pingMs" : NumberLong(0),
@@ -228,6 +232,8 @@ Example
                       },
                       "optimeDate" : ISODate("2020-03-05T05:24:38Z"),
                       "optimeDurableDate" : ISODate("2020-03-05T05:24:38Z"),
+                      "lastAppliedWallTime": ISODate("2020-03-05T05:24:38Z"),
+                      "lastDurableWallTime": ISODate("2020-03-05T05:24:38Z"),
                       "lastHeartbeat" : ISODate("2020-03-05T05:24:44.114Z"),
                       "lastHeartbeatRecv" : ISODate("2020-03-05T05:24:43.998Z"),
                       "pingMs" : NumberLong(0),
@@ -336,6 +342,8 @@ Example
                       },
                       "optimeDate" : ISODate("2020-03-05T05:26:58Z"),
                       "optimeDurableDate" : ISODate("2020-03-05T05:26:58Z"),
+                      "lastAppliedWallTime": ISODate("2020-03-05T05:26:58Z"),
+                      "lastDurableWallTime": ISODate("2020-03-05T05:26:58Z"),
                       "lastHeartbeat" : ISODate("2020-03-05T05:27:06.165Z"),
                       "lastHeartbeatRecv" : ISODate("2020-03-05T05:27:06.329Z"),
                       "pingMs" : NumberLong(0),
@@ -359,6 +367,8 @@ Example
                          "t" : NumberLong(3)
                       },
                       "optimeDate" : ISODate("2020-03-05T05:26:58Z"),
+                      "lastAppliedWallTime": ISODate("2020-03-05T05:26:58Z"),
+                      "lastDurableWallTime": ISODate("2020-03-05T05:26:58Z"),
                       "syncSourceHost" : "m3.example.net:27017",
                       "syncSourceId" : 2,
                       "infoMessage" : "",
@@ -384,6 +394,8 @@ Example
                       },
                       "optimeDate" : ISODate("2020-03-05T05:26:58Z"),
                       "optimeDurableDate" : ISODate("2020-03-05T05:26:58Z"),
+                      "lastAppliedWallTime": ISODate("2020-03-05T05:26:58Z"),
+                      "lastDurableWallTime": ISODate("2020-03-05T05:26:58Z"),
                       "lastHeartbeat" : ISODate("2020-03-05T05:27:06.165Z"),
                       "lastHeartbeatRecv" : ISODate("2020-03-05T05:27:06.165Z"),
                       "pingMs" : NumberLong(0),
@@ -608,6 +620,8 @@ Example
                       },
                       "optimeDate" : ISODate("1970-01-01T00:00:00Z"),
                       "optimeDurableDate" : ISODate("1970-01-01T00:00:00Z"),
+                      "lastAppliedWallTime": ISODate("1970-01-01T00:00:00Z"),
+                      "lastDurableWallTime": ISODate("1970-01-01T00:00:00Z""),
                       "lastHeartbeat" : ISODate("2020-03-05T18:04:23.827Z"),
                       "lastHeartbeatRecv" : ISODate("2020-03-05T18:04:15.062Z"),
                       "pingMs" : NumberLong(0),
@@ -629,6 +643,8 @@ Example
                          "t" : NumberLong(-1)
                       },
                       "optimeDate" : ISODate("1970-01-01T00:00:00Z"),
+                      "lastAppliedWallTime": ISODate("1970-01-01T00:00:00Z"),
+                      "lastDurableWallTime": ISODate("1970-01-01T00:00:00Z""),
                       "syncSourceHost" : "m1.example.net:27017",
                       "syncSourceId" : 0,
                       "infoMessage" : "",
@@ -1334,6 +1350,22 @@ following fields:
       entry from the :term:`oplog` that this member applied to its
       journal.
 
+   .. data:: replSetGetStatus.members[n].lastAppliedWallTime
+
+      .. versionadded:: 5.1.1
+
+      An :term:`ISODate` formatted date string reflecting the wall clock
+      time at which the last operation applied by this member of the 
+      replica set was applied on the primary node.
+
+   .. data:: replSetGetStatus.members[n].lastDurableWallTime
+
+      .. versionadded:: 5.1.1
+
+      An :term:`ISODate` formatted date string reflecting the wall clock
+      time at which the last operation written to this member's journal 
+      was first applied on the primary node.
+
    .. data:: replSetGetStatus.members[n].electionTime
 
       For the current primary, information regarding the election