Add single source of Seletors

Also this commit, adds condition to setup testbundle, that ignores
directories

Commit adds new set of functions that allow easy selection of
documents from bundle for different modules.

Relates-To: #61
Closes: #61

Change-Id: I6011203a1f573cbb847e9f57c04aa60bf8278ef1

manifests/function/ephemeral/baremetal.yaml

@@ -2,11 +2,12 @@ apiVersion: metal3.io/v1alpha1
 kind: BareMetalHost
 metadata:
   labels:
-    airshipit.org/node-role: "control-plane"
+    airshipit.org/ephemeral-node: "true"
   name: master-0
 spec:
   online: true
   bootMACAddress: 00:3b:8b:0c:ec:8b
+  networkData: "somedata: working data"
   bmc:
     address: redfish+http://localhost:8000/redfish/v1/Systems/air-ephemeral
     credentialsName: master-0-bmc-secret

manifests/function/ephemeral/secret.yaml

@@ -2,7 +2,7 @@ apiVersion: v1
 kind: Secret
 metadata:
   labels:
-    airshipit.org/node-role: "control-plane"
+    airshipit.org/ephemeral-user-data: "true"
   name: node1-bmc-secret
 type: Opaque
 stringData: