Integration of new SRT LDO derotators into centos_7_compatibility branch (#925)

* Moved some method from GenericDerotator to SRTKBandDerotator

The methods were not generic, they were specific methods of the old SRTKBandDerotator decommissioned interface.
These methods are not even called by the DewarPositioner component, therefore it was safe to remove them from the GenericDerotator interface.

* Moved another unused method

* Updated GenericDerotator interface

* Fix #865, fix #869, updated SRTMinorServo component

The component now handles correctly a SETUP command.
The component is also capable of commanding the gregorian air blade with the 'setGregorianAirBladeStatus' command.
A few bugs were fixed here and there.
This branch MUST be tested with the real hardware before merging it onto the centos_7_compatibility branch.

* Fixed small bug

* Removed redundant script

* Uploading files in order to test a clean repository

* Updated PyDewarPositioner for Python 3

* First LDO Derotators working implementation

This commit also brings some clean up inside the SRT test CDB.
All the stuff that is not used in the production environment has been moved out of the production and test environment and into the Outdated CDB.

* KBand derotator updates

* Moved SRTDerotators out of SRTMinorServoBossCore

Each derotator now has its thread for updating its status