Update es-restlog for ES 7.16.2

[etsymadho]

In addition to version update and jvm dependency update, there was an update for XContentHelper import for convertToJson call.

There was an change between version 7.15.2 and 17.16.x

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version 7.15.2:
public static String convertToJson​(BytesReference bytes,
boolean reformatJson,
org.elasticsearch.common.xcontent.XContentType xContentType)

Reference: https://www.javadoc.io/doc/org.elasticsearch/elasticsearch/7.15.2/org/elasticsearch/common/xcontent/XContentHelper.html

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version 7.16.2:
public static String convertToJson(BytesReference bytes,
boolean reformatJson,
org.elasticsearch.xcontent.XContentType xContentType)

Reference: https://www.javadoc.io/doc/org.elasticsearch/elasticsearch/7.16.2/org/elasticsearch/common/xcontent/XContentHelper.html

[cristi-]

Can you also update the log4j version:

es-restlog/WORKSPACE

Line 33 in c63300d

'org.apache.logging.log4j:log4j-api:jar:2.11.1',

to the version used by ES?
Thank you!

[etsymadho]

ES 7.16.2 using log4j 2.17.0

Reference: https://www.elastic.co/guide/en/elasticsearch/reference/current/release-notes-7.16.2.html

[cristi-]

lg!