Fixes potential deadlock on project close after installing a package. Fixes exception in RenameDocument when FindAndLockDocument succeeds but returns a null hierarchy.
Fixes potential deadlock on project close after installing a package.
Fixes exception in RenameDocument when FindAndLockDocument succeeds but returns a null hierarchy.

mousetraps/xtvs-common,mousetraps/xtvs-common,Microsoft/VisualStudio-SharedProject,enricosada/VisualStudio-SharedProject