GRAILS-7455 replaced commons-dbcp with Tomcat Pool
changed uninstall-plugin to only display message; removed support for global plugins since that makes no sense without install-plugin; removed dead code; added error handling for missing plugin during install-plugin
remove src/test/groovy from source for some projects in eclipse since greclipse doesn't support ASTs and tests in same project
remove "@Override" to make this class compile in Eclipse (STS)
Fix static type checking compiling problems