removed siteclass attribute from SiteCollection
removed siteclass attribute from SiteCollection


Former-commit-id: b3bc6fd407dd55d3dd9bfefce6783f6f7b96e5ce [formerly 21266ecde77dc858341da80bd02d2da95ceb9b53]
Former-commit-id: 52a5d61818c4d26d519f658bb2ed1651a2050bf0
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine