Use IPV6 feature for filtering mesh, client, and sockets

Author: theotherjimmy

tools/test/examples/examples.json

@@ -5,8 +5,8 @@
     "https://developer.mbed.org/teams/mbed-os-examples/code/mbed-os-example-ble-HeartRate" :
     {"features": ["BLE"]},
     "https://developer.mbed.org/teams/mbed-os-examples/code/mbed-os-example-mesh-minimal" :
-    {"features": ["IPV4"]},
-    "https://github.com/ARMmbed/mbed-os-example-client" : {"features": ["IPV4"]},
-    "https://github.com/ARMmbed/mbed-os-example-sockets" : {"features": ["IPV4"]},
+    {"features": ["IPV6"]},
+    "https://github.com/ARMmbed/mbed-os-example-client" : {"features": ["IPV6"]},
+    "https://github.com/ARMmbed/mbed-os-example-sockets" : {"features": ["IPV6"]},
     "https://github.com/ARMmbed/mbed-os-example-uvisor" : {"targets": ["K64F"]}
 }