enable testSharedMapBlocks() and make some minor tweaks to remove Thread.sleep().  the result.get() is expected to return null, so removed that assertion.
enable testSharedMapBlocks() and make some minor tweaks to remove Thread.sleep().  the result.get() is expected to return null, so removed that assertion.

Spotme/couchbase-lite-android,gotmyjobs/couchbase-lite-android,netsense-sas/couchbase-lite-android,vladoatanasov/couchbase-lite-android,0359xiaodong/couchbase-lite-android,0359xiaodong/couchbase-lite-android,cesine/couchbase-lite-android,cesine/couchbase-lite-android,0359xiaodong/couchbase-lite-android,netsense-sas/couchbase-lite-android,msdgwzhy6/couchbase-lite-android,msdgwzhy6/couchbase-lite-android,vladoatanasov/couchbase-lite-android,couchbase/couchbase-lite-android,Spotme/couchbase-lite-android,couchbase/couchbase-lite-android,Spotme/couchbase-lite-android,vladoatanasov/couchbase-lite-android,Spotme/couchbase-lite-android,0359xiaodong/couchbase-lite-android,gotmyjobs/couchbase-lite-android,netsense-sas/couchbase-lite-android,netsense-sas/couchbase-lite-android,cesine/couchbase-lite-android,msdgwzhy6/couchbase-lite-android,msdgwzhy6/couchbase-lite-android,cesine/couchbase-lite-android,vladoatanasov/couchbase-lite-android