FORUM-920: [Quick Creation Topic] Missing forum of renamed spaces

Problem analysis:
* Space's pretty name changes after renaming while space's forum doesn't.

Fix description:
* Use space's group ID to get space forum.

Conflicts:

	application/create/src/main/java/org/exoplatform/forum/create/UICreateForm.java
FORUM-922 | Remove "WARN | Can not find resource bundle for key" display on console create by UIFormSelectBoxForum
Merge commit '96cddf5b61976fd633ff158919cca0fb9b71c1a6' into HEAD