restructure rcloud-base as a single base controller (#37)

* restructure rcloud-base as a single base controller
* updated master.rest
* moved sentry from internal to pkg as it is used by relay
* removing unused rpc and it's dependencies
* Fix usermgmt tests
* Don't redefine variables in rest file
Co-authored-by: Abin Simon <abin.simon@rafay.co>

pkg/controller/runtime/testdata/configmap.yaml

@@ -0,0 +1,12 @@
+kind: ConfigMap
+apiVersion: v1
+metadata:
+  name: example-config
+  namespace: default
+data:
+  example.property.1: helloss
+  example.property.2: world
+  example.property.file: |-
+    property.1=value-1
+    property.2=value-2
+    property.3=value-3