IdStory Identity Manager

I've added quick improvement, before list of concepts will be removed from request:
https://github.com/bcvsolutions/CzechIdMng/commit/42e10f6a900a65359de3d97104e63651b3c51cd5

Now are concepts loaded in less number of selects (fetch mode is applied now - see #1619)

Implemented. Everythin is in the develop.

Tests remains.

Documentation:

The table of user roles changes has been redesigned. All logic was move from frontend to backend. This new table (RequestIdentityRoleTable) is pageable, sorting, filtering on backend now.
- For this table was created new DTO ``IdmRequestIdentityRoleDto``, representing change for specific identity-role entity.
- For this table was created new REST endpoint too ``/request-identity-roles``. This endpoint can be calling with starndard CRUD operations. Logic in this REST (service ``IdmRequestIdentityRoleService``) will be automatically creates role-concepts.
- The finding method in this serivce compiles assigned identity-roles and role-concepts together and returns list of ``IdmRequestIdentityRoleDto``.
- Sorting works separatly for identity-roles and concepts. For this reason are first returns concepts adding new assign roles. Then are returns currentlly assigned identity-roles. If for returns identity-role exists remove or update concept, then is identity-role marked as changed. Role-concepts and identity-roles are always returns as ``IdmRequestIdentityRoleDto``.
- For performance reasons, the REST endpoint for role-request, returns request without concepts (from this version)! For same reason ``IdmRoleRequestService`` doesn't returns concepts in the request from now. If you need to get request with a concepts, you can use this:

    roleRequestService.get(requestId, new IdmRoleRequestFilter(true));

Support for filtering by more enviroments added.

https://github.com/bcvsolutions/CzechIdMng/commit/d5dc1f0a402f6831442e0d4dc1b5500f3013697a

Slash is hidden too.

https://github.com/bcvsolutions/CzechIdMng/commit/7640895b617c0ee62c56e76356fed540c05cf5d1

After supports for filtering by environments was added some tests doesn't pass. Problem was in the identityRoleFilter - fixed.

https://github.com/bcvsolutions/CzechIdMng/commit/0aebbe96d17c3c941ff8b856957d2d2df1c8c60f