https://jira.hyperledger.org/browse/FAB-2388



Instead of creating/deleting same database multiple times, the
unit-tests now use different databases for each test. This should avoid
hitting the database deletion async issue in Couch 2.x.

Activating statecouchdb unit-tests.

Change-Id: Iba6eff9e259098971cf9063f467350a478ff2dab
Signed-off-by: Adnan Choudhury <adnan.choudhury@itpeoplecorp.com>