CBQE-0: remove unused variables from CompactionTests.cc

Change-Id: I8147e3c4991805d52c261a8a4cdffa254f8000d7
Reviewed-on: http://review.couchbase.org/44087
Reviewed-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>
Tested-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>
CBQE-0: create wrapper for run_compaction and get_db_info for CompactionTests.cc

Change-Id: I1abecd856b0d4f0f0ef6db710f2d646f5d5b427d
Reviewed-on: http://review.couchbase.org/44098
Reviewed-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>
Tested-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>
CBQE-0: disable auto-compaction for ep-engine compaction test cases where autocompaction not required

Change-Id: Id503dc72532dd4de866bb56926e6763a3014805f
Reviewed-on: http://review.couchbase.org/44139
Reviewed-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>
Tested-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>