Updated plugin to work with Grails 2.4:

- Update grails version
- Removed spock plugin (now bundled with grails)
- Added needed spring dependencies because of upgrade to Spring 4
- Refresh GenericApplicationContext _before_ use (otherwise Spring 4 blows up)
- Removed use of ConfigurationHolder
- Fixed applicationContext.xml for Grails 2.4
- Upgrade CXF to 2.6.6. Newer versions breaks testsuite
Release plugin still conflicts with Geb, was unable to fix be excluding
nekohtml etc, so just uncomment again.
Merge branch 'master' of https://github.com/Grails-Plugin-Consortium/grails-cxf

Conflicts:
	grails-app/conf/BuildConfig.groovy
Fixed brainfart
Merge pull request #40 from legart/master

Updated plugin to work with Grails 2.4: