Turn off the ClassJavadoc rule for now

We have a lot of docs to write before we can pass the fixed version of this rule which will get released in the next version of CodeNarc.
Temporary solution to enable use of custom CodeNarc rules while we wait for CodeNarc to get fixed
ConsecutiveBlankLines custom CodeNarc rule
Merge pull request #436 from joesondow/custom-codenarc-rule-consecutive-blank-lines

Custom codenarc rule ConsecutiveBlankLines