Add `any` to the list of property types
Expose `ModelProperty.availableTypes` via REST

The URL is `GET /ModelProperties/available-types`.
Merge pull request #140 from strongloop/feature/expose-model-property-types-via-rest

Expose model property types via rest
3.3.0
Merge branch 'release/3.3.0' into production
Merge tag 'v3.3.0'

3.3.0
test: enable mysql tests on Jenkins