Testconfig: Force IOS stages to succeed

Fixing the location of QtBase_stable/release_Integration stages'
and QtXmlPatterns_dev_Integration IOS stage's forcesuccess property.

Change-Id: I3221bc0177b7465992d8fb3a1a07b4c61b335a8f
Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>