[HBASE-6967][89-fb] Bugfix for dynamic loading in Store

Author: adela

Summary:
Store should work with the default compaction hook when there
is no jar specified. The bug was introduced with:
https://phabricator.fb.com/D680766

Test Plan: run full unitest suite

Reviewers: liyintang

Reviewed By: liyintang

CC: hbase-eng@

Differential Revision: https://phabricator.fb.com/D682078

Task ID: 2027229

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.89-fb@1435305 13f79535-47bb-0310-9956-ffa450edef68
[89-fb] [HBASE-7509] Initialize the number of threads for quorum reads after initializing fs

Author: aaiyer

Summary:
It looks like quorum reads are disabled on start up; irrespective of the
setting because the call was made before initializing the file system.
Ensure the correct order, so the configuration setting is respected.

Test Plan:
deploy to dev cluster and restart. Ensure that quorum reads
are enabled

Reviewers: liyintang

Reviewed By: liyintang

CC: hbase-eng@

Differential Revision: https://phabricator.fb.com/D678660

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.89-fb@1435306 13f79535-47bb-0310-9956-ffa450edef68