Change constants.js help links to use configurable base URL

[damemi]

In constants.js, each doc link is hardcoded to direct to container platform docs. This means that for environments that extend these links, such as online and dedicated, a full copy of this list needs to be maintained and updated any time the link changes in constants.js.

Since the only difference is the base URL (ie, https://docs.openshift.com/container_platform/3.4/), propose changing these links to use a configurable window.OPENSHIFT_CONSTANTS.HELP_BASE_URL variable to reduce the number of variables that need to be maintained.

Example:
"cli": window.OPENSHIFT_CONSTANTS.HELP_BASE_URL+"/cli_reference/overview.html",

[jwforres]

@damemi it will be in OCP 3.5, docs PR for reference on how to customize it openshift/openshift-docs#3268

[damemi]

@jwforres is there any reason it needs to wait for 3.5?

[jwforres]

@damemi only significant blockers are going into 3.4 at this point