Exempt a routine form perlcritic's complexity check

I'll get to refactoring it later.
v0.050

  [Changes]

  - CheckJira's githooks.checkjira.project option is now strict, i.e., when
    it's set specifying a set of JIRA projects only those project's issues
    may be refered to in the commit messages. Other project's issues are
    rejected. Previously, other project's issues were accepted without any
    other check.

  - Make error messages more uniform.