Remove blob_version cache from admin app because it breaks multiprocess setups.
Remove blob_version cache from admin app because it breaks multiprocess setups.

mozbhearsum/balrog,nurav/balrog,nurav/balrog,testbhearsum/balrog,aksareen/balrog,testbhearsum/balrog,aksareen/balrog,nurav/balrog,tieu/balrog,testbhearsum/balrog,aksareen/balrog,tieu/balrog,aksareen/balrog,mozbhearsum/balrog,tieu/balrog,mozbhearsum/balrog,tieu/balrog,testbhearsum/balrog,nurav/balrog,mozbhearsum/balrog