Fixed some typos and error message

Change-Id: I640a00fda787339ba79350348d89a2922ee6a6ab

krm-functions/cloud-init/main.go

@@ -62,7 +62,7 @@ func docFromRNode(rnode *yaml.RNode) (document.Document, error) {
 		return nil, err
 	}
 	if len(collection) == 0 {
-		return nil, errors.New("Error while converting RNode to Document: empty document bundle")
+		return nil, errors.New("error while converting RNode to Document: empty document bundle")
 	}
 	return collection[0], nil
 }

krm-functions/templater/README.md

@@ -66,6 +66,6 @@ following structure.
         bootMACAddress: {{ .macAddress }}
       {{ end -}}
 
-`values` defines the substituion value as Map.
-`template` defines the template with placeholders to substitue the value from the
+`values` defines the substitution value as Map.
+`template` defines the template with placeholders to substitute the value from the
            values Map

krm-functions/toolbox-virsh/README.md

@@ -1,4 +1,3 @@
 # toolbox-virsh image
 
 This image based on the airshipctl toolbox krm-function. It allows to execute libvirt-client(virsh) inside a container.
-

krm-functions/toolbox/main_test.go

@@ -74,7 +74,7 @@ func TestCmdRun(t *testing.T) {
 			},
 		},
 		{
-			name:        "WorkDir that doesnt' exist",
+			name:        "WorkDir that doesn't exist",
 			workdir:     "foobar",
 			errContains: "open foobar/my-script.sh: no such file or directory",
 			configMap: &v1.ConfigMap{