Changes

nokia_site: add function to unlock and reset TRXes

We have a long outstanding issue with TRX RSL bootstrap,
espcially with BTSes with more than one TRX. The more TRX
a BTS has, the more time it takes for it get to a ready state.

This commit changes the TRX bootstrap logic as the following:

1. During OML initial config, all TRXes are configured locked.
   This gives a better controled state of TRXes, and the BTS
   enough time to do internal checks, SW load etc.
2. BTS_CONF_COMPL usde as entry point for the RSL bootstrap.
3. Unlock all TRXes, and give the BCCH TRX a reset.
4. Start RSL bootstrap.

Runtime tested with InSite and a MetroSite with 4 TRXes.

Co-authored by: Tomcsányi Domonkos <domi@tomcsanyi.net>

Change-Id: I9042a1e24f0932a23a26185181481db2ceddbb7c