INTEG-328: [integ-ecms] Wrong File/Content activities of renamed spaces

Problem analysis:
* When renaming a space, its (pretty) name changes but its group ID and drive don't.
  SpaceService#getSpaceByPrettyName must be therefore replaced by SpaceService#getSpaceByGroupId.

Fix description:
* Implement getSpaceFromNode method to retrieve the space from the JCR node for a content/file added into the space's drive.
INTEG-328: Fix the method name in ContentUIActivity.gtmpl
INTEG-328: Revert changes in template files.

Fix description:
* The space name is updated thanks to SOC-4332.
INTEG-328: Delete redundant method
Merge pull request #9 from exodev/fix/4.1.x/INTEG-328

INTEG-328: [integ-ecms] Wrong File/Content activities of renamed spaces
INTEG-330 [integ-forum] Rendering error of Forum activity after renaming a space

Fix description: in function buildSpaceLink of BuildLinkUtils class, use method getSpaceHomeURL from social to get new space url.
INTEG-330 [integ-forum] Rendering error of Forum activity after renaming a space

Fix description:
- use ForumActivityUtils.getSpaceService() to get SpaceService
- delete method getSpaceHomeURL(String spaceGroupId) because we don't need it anymore
INTEG-342 | Home and User AS crashes after removing a space having question and answer
Merge commit '584d89c1cab93ebf4a0804ce96341378fc6f04a3' into HEAD