(refactor): add custom exception

as requested in:

* opendevstack#1108 (comment)

src/org/ods/orchestration/phases/DeployOdsComponent.groovy

@@ -69,7 +69,7 @@ class DeployOdsComponent {
                     }
 
                     if (podData == null) {
-                        throw new RuntimeException(
+                        throw new DeployOdsComponentException(
                         "Error: Could not find 'running' pod(s) with label"
                         + "'${deploymentMean.selector}'"
                         )

src/org/ods/orchestration/phases/DeployOdsComponentException.groovy

@@ -0,0 +1,19 @@
+package org.ods.orchestration.phases
+
+class DeployOdsComponentException extends RuntimeException {
+
+    DeployOdsComponentException() {
+    }
+
+    DeployOdsComponentException(String message) {
+        super(message)
+    }
+
+    DeployOdsComponentException(String message, Throwable cause) {
+        super(message, cause)
+    }
+
+    DeployOdsComponentException(Throwable cause) {
+        super(cause)
+    }
+}