RESSERV-78: Update dependencies : yuicompressor-maven-plugin and jarjar-maven-plugin

yuicompressor-maven-plugin : 1.3.3 --> 1.4.0
jarjar-maven-plugin : 1.7 --> 1.9

Fix Typo in  resource-server-utils/src/main/java/org/jasig/resourceserver/utils/aggr/ResourcesElementsProviderImpl.java