Allow linters to be disabled/enabled via inline comments

Change-Id: Ie8f6da6441d1239dbf39f3859cff4f716ad5d9c3
Reviewed-on: http://gerrit.causes.com/44909
Tested-by: jenkins <jenkins@brigade.com>
Reviewed-by: Shane da Silva <shane.dasilva@brigade.com>
Add documentation for enable/disable inline comments

Change-Id: I1cab281d48bc5ec4d7a9279ab7bc911f5b9085ae
Reviewed-on: http://gerrit.causes.com/44910
Tested-by: jenkins <jenkins@brigade.com>
Reviewed-by: Shane da Silva <shane.dasilva@brigade.com>
Change `#length` check to conventional `#empty?`

Change-Id: Ie58ecd9c2e9bffa5d892b342ad196e6102a9e2fe
Reviewed-on: http://gerrit.causes.com/44911
Tested-by: jenkins <jenkins@brigade.com>
Reviewed-by: Shane da Silva <shane.dasilva@brigade.com>