RSS Utilities refactor

[ubeda]

To be done ( in this order ):

• Clean unused code
• Remove exceptions
• Remove bad code ( e.g. issue 401 )
• Remove prints, use gLogger

[ubeda]

Many things to be refactored, I prefer to split the changes into various pulls.
The first pull is #540

• Fixes exceptions

[ubeda]

Added from issue triggered by Ricardo:

• Remove code execution at init.py

[ubeda]

Second pull request #563

• minor burgixes
• pyLint compliant ( not perfect, but getting better )

[atsareg]

Is this task fully fixed in the already created pull requests ?

[ubeda]

I want to get rid of a few more methods ( but are used on LHCbDIRAC, so I'm waiting for the new bits of code to be certified before refactoring anything else ). But will be closed soon.

[ubeda]

init has been completely cleaned and not anymore code is executed there, on Pull 696

Closing this issue.