re-factor and enhanced logging
re-factor and enhanced logging

re-factored some of the stuff, adapted wording and output, made verbose / debug more comprehensive and added colored logging output

Signed-off-by: Ralph Schmieder <071b77189b4aabd52c4e38afde4f209b0660b0e2@cisco.com>

ios-xr/iosxrv-x64-vbox,ios-xr/iosxrv-x64-vbox,ios-xr/iosxrv-x64-vbox