* Improve perf_SUITE test
The update teat is refactored so as not to generate. a large KV list which dominates the memory utilisation.
The update and the get tests changes to do a head before each operation - which emulates how this will work in RIAK.
* Revert default setting change
* Don't pre-calculate key list
For fetches - reduces memory required for test process not database (and consequent distortion to measured results)
* Tidy ++ in tests
Removes some rogue results from profile
* Update testutil.erl
* Test fixes
* Tidy generate_chunk for profiling
* Revert "Tidy generate_chunk for profiling"
This reverts commit 1f6cff446ca6b9855f1e3aa732b32e0e5c14c9a5.
* Resize profile test
acf30599e9