CDH-10408: Provide whirr.env.cmauto to enable/disable cm auto install/config/launch
CDH-10408: Switch whirr.env.cmauto default from false to true
CDH-10408: add whirr.env.cmauto doc and default in config
Merge remote-tracking branch 'ggear/graham-patch-CDH-10408'

Conflicts:
	src/main/java/com/cloudera/whirr/cm/CmServerHandler.java