Aerogear 7683 provision deprovision keycloak

[philbrookes]

@JameelB @dimitraz rebased and tested your work after merging @mikenairn PR into master.

I've also rebased the changes Dimitra made to the keycloak-apb on top of the work @witmicko and I did over the last week: https://github.com/aerogearcatalog/keycloak-apb/pull/107

Using these together seems to be working really well!

[philbrookes]

To see this working:

• Have the keycloak-operator running

• Have the keycloak-apb with the shared plan available in your catalog

• Create a SharedService CRD with > 0 min_instances.

• OR create a SharedService CRD with > 0 required_instances and < max_instances.

This should:

• create a min_instances number of keycloak CRDs
• deploy Keycloak once for each keycloak CRD

Things worth testing:

• deleting the sharedservice CRD deletes the keycloak CRDs which also deletes the keycloak instances.
• setting min_instances > required_instances provision min_instances number of keycloaks.
• setting required_instances > min_instances provision required_instances number of keycloaks.
• setting require_instances > max_instances only provisions max_instances number of keycloaks.

N.B. Each test case needs to be a newly created SharedService CRD.

[dimitraz]

@philbrookes will there be a phase in the future which allows the user to modify the number of slices for a single keycloak?

[philbrookes]

made suggested changes, merging

[dimitraz]

This is late, but I tested all of the use cases and they are all working as expected