Fix GC caching, and enable baremetal int tests.

See merge request !462

(cherry picked from commit 962d55c1)

b0108ff2 fix cache properties
8eea6c1b Merge branch 'master' into gc-fix-cache
d9d9b19c restructure cache handling, code cleanups
5b70a3c4 added handling for unavailable subscriptions
cb2c50cb unit and integration testing
f59dd0d4 add test resources
15febd49 update README
2b248bdd Updating NOTICE
a5dc7407 add sleep in test after sub created
f51b1846 remove ttl for subs cache
e88de9dc remove not necessary while loop