Functional test to surface index version conflicts

[bhavyarm]

Tests for: #22018

This test:

1. Creates a scripted field on logstash index, uses es client to update the field format of another field in the same index pattern and tries to save the scripted field. Expects Kibana to display version conflict refresh your page message
2. Tries to update the field format of a field in logstash index, uses es client to update the field format of another field and tries to save the updated field format of first field. Expects Kibana to display version conflict refresh your page message

[elasticmachine]

💔 Build Failed

• continuous-integration/kibana-ci/pull-request

[bhavyarm]

jenkins, test this!

[elasticmachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request

[LeeDr]

LGTM - Code review and checked Jenkins results. Only takes 17 seconds to run :-)

17:22:48        └-: index version conflict
17:22:48          └-> "before all" hook
17:22:48          └-> "before all" hook
17:22:50          └-> Should be able to surface version conflict notification while creating scripted field
17:22:50            └-> "before each" hook: global before each
17:22:58            └- ✓ pass 
17:22:58          └-> Should be able to surface version conflict notification while changing field format
17:22:58            └-> "before each" hook: global before each
17:23:05            └- ✓ pass 
17:23:05          └-> "after all" hook
17:23:05        └-> "after all" hook
17:23:05        └-> "after all" hook