Create a fresh Title object in the job

If a namespace does not exist on the submission site,
it is stored as NS_MAIN. When the job is executed
on the target site, Title::getNamespace() will return
NS_MAIN even though it now exists, causing errors since
it appears to be in the wrong namespace.

Bug: 57464
Change-Id: I6e7d970473a86a1c6b2fb4f0f54019a2a2407458
Merge "Create a fresh Title object in the job"