wwan: T3795: move implementation to VbashOpRun()
wwan: T3795: move implementation to VbashOpRun()

After commit ae16a51506c ("configquery: T3402: use vyatta-op-cmd-wrapper to
provide environment") we can now call VyOS op-mode commands from arbitrary
Python scripts.

vyos/vyos-1x,vyos/vyos-1x,vyos/vyos-1x,vyos/vyos-1x