Updater: Only try to fetch updates once (even if it fails)
Updater: Only try to fetch updates once (even if it fails)

Do not repeatedly try to fetch updates, but only once.

Change-Id: Id177b6677077e97132c7b40af3de35015a9c7658
Reviewed-by: Eike Ziller <c142da16c73a95a82d35191bcc55b22835617128@digia.com>

Distrotech/qtcreator,Distrotech/qtcreator,Distrotech/qtcreator,kuba1/qtcreator,amyvmiwei/qt-creator,martyone/sailfish-qtcreator,danimo/qt-creator,xianian/qt-creator,kuba1/qtcreator,xianian/qt-creator,danimo/qt-creator,danimo/qt-creator,maui-packages/qt-creator,Distrotech/qtcreator,omniacreator/qtcreator,xianian/qt-creator,AltarBeastiful/qt-creator,farseerri/git_code,farseerri/git_code,kuba1/qtcreator,colede/qtcreator,farseerri/git_code,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator,xianian/qt-creator,maui-packages/qt-creator,maui-packages/qt-creator,farseerri/git_code,AltarBeastiful/qt-creator,darksylinc/qt-creator,xianian/qt-creator,danimo/qt-creator,amyvmiwei/qt-creator,farseerri/git_code,martyone/sailfish-qtcreator,danimo/qt-creator,farseerri/git_code,AltarBeastiful/qt-creator,Distrotech/qtcreator,kuba1/qtcreator,xianian/qt-creator,colede/qtcreator,amyvmiwei/qt-creator,maui-packages/qt-creator,farseerri/git_code,maui-packages/qt-creator,darksylinc/qt-creator,maui-packages/qt-creator,amyvmiwei/qt-creator,darksylinc/qt-creator,colede/qtcreator,martyone/sailfish-qtcreator,danimo/qt-creator,omniacreator/qtcreator,colede/qtcreator,omniacreator/qtcreator,amyvmiwei/qt-creator,omniacreator/qtcreator,amyvmiwei/qt-creator,kuba1/qtcreator,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator,darksylinc/qt-creator,kuba1/qtcreator,kuba1/qtcreator,AltarBeastiful/qt-creator,AltarBeastiful/qt-creator,darksylinc/qt-creator,danimo/qt-creator,danimo/qt-creator,darksylinc/qt-creator,darksylinc/qt-creator,maui-packages/qt-creator,xianian/qt-creator,kuba1/qtcreator,AltarBeastiful/qt-creator,xianian/qt-creator,martyone/sailfish-qtcreator,colede/qtcreator,omniacreator/qtcreator,omniacreator/qtcreator,amyvmiwei/qt-creator,xianian/qt-creator,amyvmiwei/qt-creator,colede/qtcreator,Distrotech/qtcreator,colede/qtcreator,farseerri/git_code,martyone/sailfish-qtcreator,kuba1/qtcreator,Distrotech/qtcreator,AltarBeastiful/qt-creator,darksylinc/qt-creator,AltarBeastiful/qt-creator,danimo/qt-creator,omniacreator/qtcreator