Allow blackbox targets to be specified via a BlackboxTargets CRD/CR INTLY-2618

[davidkirwan]

JIRA: https://issues.jboss.org/browse/INTLY-2618

Allow blackbox targets to be specified via a BlackboxTargets CRD/CR Installer version bump PR: https://github.com/integr8ly/installation/pull/751

Verification:

• Checkout code from my fork/branch davidkirwan:blackboxtargets_crd
• Deploy, crd, and apply roles: -- oc apply -f deploy/crds/BlackboxTarget.yaml -- oc apply -f deploy/operator_roles -- oc apply -f deploy/roles
• If verifying this in an integreatly cluster which already has the Application Monitoring Operator running do the following: -- In the namespace middleware-monitoring spool down the application monitoring operator instance to 0
• Launch the operator locally: operator-sdk up local --namespace "middleware-monitoring"
• Create a BlackboxTarget CR: oc apply -f deploy/example/BlackboxTarget.yaml
• Operator logs should show the new CR BlackboxTarget being reconciled
• Check the secret: additional-scrape-configs should have the targets array updated with the blackbox targets added via the BlackboxTarget CR
• Grafana dashboards should eventually pick these up also in the endpoints dashboards

[davidkirwan]

Sample logs showing the CR being reconciled

{"level":"info","ts":1563274421.3967912,"logger":"controller_blackboxtarget","caller":"blackboxtarget/blackboxtarget_controller.go:85","msg":"Reconciling BlackboxTarget","Request.Namespace":"middleware-monitoring","Request.Name":"example-blackboxtarget"}
{"level":"info","ts":1563274421.3969054,"logger":"controller_blackboxtarget","caller":"blackboxtarget/blackboxtarget_controller.go:138","msg":"BlackboxTarget setFinalizer CR:example-blackboxtarget"}
{"level":"info","ts":1563274421.3970015,"logger":"controller_blackboxtarget","caller":"blackboxtarget/blackboxtarget_controller.go:149","msg":"BlackboxTarget updatePhase CR:example-blackboxtarget Phase: 1"}
{"level":"info","ts":1563274421.4449716,"logger":"controller_blackboxtarget","caller":"blackboxtarget/blackboxtarget_controller.go:85","msg":"Reconciling BlackboxTarget","Request.Namespace":"middleware-monitoring","Request.Name":"example-blackboxtarget"}
{"level":"info","ts":1563274421.4450076,"logger":"controller_blackboxtarget","caller":"blackboxtarget/blackboxtarget_controller.go:106","msg":"BlackboxTarget phaseDone CR:example-blackboxtarget Phase: 1","Request.Namespace":"middleware-monitoring","Request.Name":"example-blackboxtarget"}
{"level":"info","ts":1563274421.4450185,"logger":"controller_blackboxtarget","caller":"blackboxtarget/blackboxtarget_controller.go:149","msg":"BlackboxTarget updatePhase CR:example-blackboxtarget Phase: 2"}

[david-martin]

@davidkirwan Merging this. Can you build 0.0.18 from master after, and tag & push to quay.io