Fixed bug where getContent() background task would never complete if the same url request previously failed.
Fixed bug where getContent() background task would never complete if the
same url request previously failed.

Change-Id: I5aef42d41be49fc019fac9a2ebaa2d2629b41614

WeaveTeam/WeaveJS,WeaveTeam/WeaveJS,WeaveTeam/WeaveJS,WeaveTeam/WeaveJS