mesh: Provisioning: Fix input OOB support
mesh: Provisioning: Fix input OOB support

The code was missing the sending of the Input Complete PDU, and was
also setting the link.auth value too late.

X-Original-Commit: 41acb4cff915d87015827bf1efb2c6190cf0ade1

apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble