Fix mocked platform version to make travis pass again

(cherry picked from commit 4ba0137fca480de838e0a59bab69225756373417)
Fix migration for transport key in schema (bnc#909056)

The crowbar-revision key was bumped, while we really wanted
schema-revision.

https://bugzilla.suse.com/show_bug.cgi?id=909056
(cherry picked from commit cca89783ce5c2e5c398ff7cac86542aad40afdc7)