textproc/elasticsearch6: Fix rc order

It has been found that elasticsearch is being started in wrong phase of rc
sequence.

This should bring it to more apropriate place where all services, including
cleartmp, are started.

PR: 236840
Reported by: Nemesis11 <felix@zwame.pt>
Reviewed by: osa (mentor), swills
Approved by: osa (mentor)
MFH: 2021Q1
Differential Revision: https://reviews.freebsd.org/D27874