EZP-20930: Added missing root resources + tests

- /Root/contentByRemoteId
- /Root/contentTypeByIdentifier
- /Root/contentTypeGroups
- /Root/rootUserGroup
- /Root/locationByRemoteId,
- /Root/locationByPath
- /Root/objectStateGroups
- /Root/objectStates
- /Root/globalUrlAliases
- /Root/createSession