BVAL-131 .gitignore from Daniel Cunha, thanks

git-svn-id: https://svn.apache.org/repos/asf/bval/branches/bval-11@1614431 13f79535-47bb-0310-9956-ffa450edef68
no need of Properties.EXECUTABLE_VALIDATION_TYPES + NPE protection

git-svn-id: https://svn.apache.org/repos/asf/bval/branches/bval-11@1614433 13f79535-47bb-0310-9956-ffa450edef68