Set contrib modules that are pulling dev versions to pull a specific commit sha.

This sets these modules to pull specific commit sha's:

formblock
improved_multi_select
jquery_update
pm_existing_pages
panelizer
token_filter
token_insert

Also removes a duplicate token_filter entry.
This needs to be `8e619d3118f79eaea626f6a1a3742422ac13810c`. I will commit a fix.