INTEG-341: [integ-wiki] INFO "cannot get page url" at wiki activity

Problem analysis:
* In Platform 3.5, page's URL is a full URL.
  Since Platform 4.0.0, the parameter only stores the path component.

Fix description:
* Create URL object only if the pageUrl value contains :// (which locates between the protocol and the host in a URL).
INTEG-331 [integ-wiki] Error of rendering Wiki activity after rename a space

Fix description: use new method getPageURLFromSpace from WikiUIActivity class to render wiki page url on space activity.
In case of default wiki activity (Intranet), use actual method getPageURL to render wiki page url.
Merge branch 'fix/4.1.x/INTEG-331' into feature/stabilization
Merge pull request #17 from exodev/fix/4.1.x/INTEG-341

INTEG-341: [integ-wiki] INFO "cannot get page url" at wiki activity
Merge commit '754b63174fcd81ab5c5dc8b6cdacf357e3b0a536' into HEAD