GRADLE-2743. Merged code from what appears to be the original source http://svn.apache.org/repos/asf/ant/ivy/core/trunk/src/java/org/apache/ivy/plugins/parser/xml/XmlModuleDescriptorParser.java so that ivyauthor and repository elements do not cause a Gradle validation error.
Merge remote-tracking branch 'upstream/master'
GRADLE-2743. Updated unit test to properly validate ivyauthor and repository elements.
Merge pull request #177 from jmaness/master

GRADLE-2743. Merged code from what appears to be the original source htt...