Use glance as a backend for Solum LanguagePack API (DELETE Method)

Change-Id: If171749058759479a91ad064afa170a62dcbe4a8
Simply mocks in test_lp_handler

Change-Id: I798ef56d827d81c46515d91dc659e0606c51d2ed
Add missing description field for LP

Change-Id: Icd300b43f217bdb7f64a713fcfee8e4dd050b85f
Merge "Use glance as a backend for Solum LanguagePack API (DELETE Method)"
Merge "Simply mocks in test_lp_handler"
Merge "Add missing description field for LP"