Remove check and fail for 1.6 now that builds use java 1.7

git-svn-id: http://svn.mkgmap.org.uk/mkgmap/trunk@2760 25d90789-57f7-4ee0-8453-03a3dfeeeb22
Re-enable testAllRuleFiles from ScriptedStyleTest.

It currently fails in more ways than it did when it was disabled.

git-svn-id: http://svn.mkgmap.org.uk/mkgmap/trunk@2761 25d90789-57f7-4ee0-8453-03a3dfeeeb22