[DOCS] Add 7.17.0 release notes (#1891)

Author: jrodewig

docs/src/reference/asciidoc/appendix/release-notes/7.17.0.adoc

@@ -0,0 +1,36 @@
+[[eshadoop-7.17.0]]
+== Elasticsearch for Apache Hadoop version 7.17.0
+
+[[new-7.17.0]]
+=== Enhancements
+Build::
+* Bump: log4j 2.15.0 to 2.17.0
+https://github.com/elastic/elasticsearch-hadoop/pull/1828[#1828]
+
+Serialization::
+* Adding support for the `date_nanos` field type
+https://github.com/elastic/elasticsearch-hadoop/pull/1803[#1803]
+
+[[bugs-7.17.0]]
+=== Bug Fixes
+Core::
+* Avoiding failure when using frozen indices
+https://github.com/elastic/elasticsearch-hadoop/pull/1842[#1842]
+
+MapReduce::
+* Fixing docsReceived counter
+https://github.com/elastic/elasticsearch-hadoop/pull/1840[#1840]
+
+REST::
+* Check for invalid characters in X-Opaque-ID headers
+https://github.com/elastic/elasticsearch-hadoop/pull/1873[#1873]
+
+Spark::
+* Resolve `saveToEs` saves case classes fields with `NULL` values
+https://github.com/elastic/elasticsearch-hadoop/pull/1478[#1478]
+
+* Correctly reading empty fields in as null rather than throwing exception
+https://github.com/elastic/elasticsearch-hadoop/pull/1816[#1816]
+
+* Fix `NullPointerException` bug for `es.read.fields.include`
+https://github.com/elastic/elasticsearch-hadoop/pull/1822[#1822]

docs/src/reference/asciidoc/appendix/release.adoc

@@ -9,6 +9,7 @@ This section summarizes the changes in each release.
 [[release-notes-7]]
 ===== 7.x
 
+* <<eshadoop-7.17.0>>
 * <<eshadoop-7.16.3>>
 * <<eshadoop-7.16.2>>
 * <<eshadoop-7.16.1>>
@@ -112,6 +113,7 @@ http://github.com/elastic/elasticsearch-hadoop/issues/XXX[#XXX]
 
 ////////////////////////
 
+include::release-notes/7.17.0.adoc[]
 include::release-notes/7.16.3.adoc[]
 include::release-notes/7.16.2.adoc[]
 include::release-notes/7.16.1.adoc[]