1. Added InstallationTypes::getRestrictedVerbs()
2. Updated Config resource to use new method above.
3. Updated Config.swagger with new items (is_hosted, is_private, is_guest, restricted_verbs, etc.)
4. Updated Environment resource to use new method above.
Merge branch 'develop' of github.com:dreamfactorysoftware/lib-php-common-platform into develop