Set type=internal as part of port creation

When creating an internal device with ovs-vsctl, the 'set'
operation must occur as part of the transaction that creates the
port, otherwise the device creation will fail and an ofport will
not be assigned.

Change-Id: I30ecb920ee1c64d25b5e7eed69e92bd71caac435
Merge "Set type=internal as part of port creation"