CBQE-990: sdk verification tool

looks at testcfg.py and attempts to load data to cluster
requires some sdkserver to be started

usage:
1) start sdkserver:  ./sdkserver.py
2) run tool:  python tools/sdk_test.py

TODO: parameterize

Change-Id: I2b6bc4b04a7e8896674970d9a939ce77d81a9092
Reviewed-on: http://review.couchbase.org/24142
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Chisheng Hong <chisheng@couchbase.com>