Play version 2.6.9

There's a file "playframework/framework/src/play-openid/src/main/resources/logback-test.xml" which is included in the play framework's compile artifacts. When using a custom logback-test.xml file, logback is giving warnings about multiple logback-test.xml files being found, causing lots of verbose logging.

The file should be in test/resources, like all other subprojects have (search for logback-test.xml).

This seems to have been introduced accidentally in #6771.