Standardize how AB is enabled/disabled

[rafabene]

To disable AB in https://hub.docker.com/r/fabric8/java-jboss-openjdk8-jdk/ the env var is AB_OFF To disable AB in https://hub.docker.com/r/fabric8/s2i-java/ the env var is AB_JOLOKIA_OFF

[rhuss]

Actually, the origin of this comes from https://github.com/fabric8io/agent-bond/blob/master/fish-pepper/agent-bond/readme.md it these variables server different purposes:

• AB_OFF is to switch off Agent-Bond completely (Jolokia and Prometheus)
• AB_JOLOKIA_OFF switches off only Jolokia

Since s2i only supports Jolokia, only the latter part is used. For the full image you can use both variables (which means also AB_JOLOKIA_OFF)

[rhuss]

Sorry, I was wrong. There is no AB_JOLOKIA_OFF in the standard image.