GRAILS-10288: windows fixes for tests in grails-test-suite-uber module
GRAILS-10289: windows fix for GroovyPageWithJSPTagsTests
Fixed NoClassDefFoundError after clean is called post plugin installation and fixed test-app not working for plugins due to release plugin conflict
make Spock work with integration tests
Merge pull request #381 from dmurat/GRAILS-10289

GRAILS-10289: windows fix for GroovyPageWithJSPTagsTests
Merge pull request #380 from dmurat/GRAILS-10288

GRAILS-10288: windows fixes for tests in grails-test-suite-uber module