textproc/elasticsearch6: Fix run issues
rP463358
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Description

textproc/elasticsearch6: Fix run issues

Elastic no longer accepts -Epath.conf argument. Change to ES_PATH_CONF env
Elastic was not honoring the elasticsearch_tmpdir rc.conf variable. Remove. The default behavior is to use mktemp for a unique tmpdir in /tmp. This seems sane, especially when running multiple profiles.
Patch jvm.options to set a writable location for gc.log, which will be the tmpdir. There is not an easy way to automatically point this to the log dir, so it needs a unique location when running muliple profiles.
devel/jca is also a BUILD dependency to fix build outside poudriere