#957 Enabling Visual Builder in OIC

Visual Builder is available by default, when you provision an OIC gen 2 instance. However, in OIC3, one needs to explicitly enable it. Here are the simple steps to do so - 

1. Create your OIC3 instance, unless you already have one. Then follow the screenshots - 

e.g. allow group domain_admins to manage visualbuilder-instance in compartment oic-dev-comp