pep 8 clean up on tomcat state
Uninstall and reinstall pylint.
We currently do **not** want pylint 1.0.0 since logilab-common-0.60.0 is not yet released.
Merge pull request #6541 from michaelrice/tc-state-pep8

pep 8 clean up on tomcat state
Under python 2.6 using `{}.format()`(without an index) is a `ValueError`.
Merge pull request #6540 from s0undt3ch/develop

We currently do **not** want pylint 1.0.0 since logilab-common-0.60.0 is not yet released
Fix stack trace in prereq, fix #6057
Fix #6520

prereq will now detect if mod_watch is expected to be triggered and report the trigger as a change
Since this is a transient return it can be a bit smaller