[JBIDE-13708] ensure can deal with short answer (no reason phrase)
Tests remove unneeded cartridges before running
changed test for embedded cartridges to kill unnneeded cartridges
before running so that they dont running into gear shortage
ensure and assert with 2 different users to have
tests independent of each other
fixed erroneous EmbeddedCartridgeTestUtils#ensureHasEmbeddedCartridges
kill existing jenkins app before creating new one (ApplicationResourceIntegrationTest#shouldCreateJenkinsApplication)
fixing integration tests: ensure non-scalable app to embed rockmongo
fixing EmbeddedCartridgeResourceIntegrationTest#shouldReturnEmbeddedCartridges

test eventually killed the application that was eventually used in test
fixing integration tests
removed stack trace printing
fixed ApplicationResourceIntegrationTest#shouldCreateScalableApplication
fixed EmbeddedCartridgeResourceIntegrationTests

fixed #shouldEmbedMySQL, #shouldEmbedPostgreSQL, #shouldEmbedRockMongo if
they're running against a scalable app (removed assertion for 0 embedded
cartridges, replaced by assertion for specific embedded cartridge to not
be present).
fixing ApplicationResourceIntegrationTest
[JBIDE-13761] removed IUser#getAuthKey and IUser#getAuthIV