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
CDH-10438: Remove CM config upload
CDH-10438: Paramterize repos and fix repo version switch bug
CDH-10439: Do not install cdh packages on agent hosts - leave this to CM (likely parcels in CM 4.5+)
Merge remote-tracking branch 'ggear/graham-patch-CDH-10408'

Conflicts:
	src/main/java/com/cloudera/whirr/cm/CmServerHandler.java
Merge remote-tracking branch 'ggear/graham-patch-CDH-10439'