GRAILS-2391
GRAILS-2391

Add default values for grails.views.default.codec and grails.views.gsp.encoding duing upgrade if those properties don't already exist

git-svn-id: 29aad96320b2a07b98332cd568fc1316025c072f@6683 1cfb16fd-6d17-0410-8ff1-b7e8e1e2867d

jeffbrown/grailsnolib,jeffbrown/grailsnolib