Slightly relax runInPodWithMultipleContainers as it breaks with custom default image

Author: Vlatombe

src/test/java/org/csanchez/jenkins/plugins/kubernetes/pipeline/KubernetesPipelineTest.java

@@ -291,7 +291,6 @@ public void inheritFrom() throws Exception {
     @Test
     public void runInPodWithMultipleContainers() throws Exception {
         r.assertBuildStatusSuccess(r.waitForCompletion(b));
-        r.assertLogContains("image: \"jenkins/inbound-agent:", b);
         r.assertLogContains("image: \"maven:3.3.9-jdk-8-alpine\"", b);
         r.assertLogContains("image: \"golang:1.6.3-alpine\"", b);
         r.assertLogContains("My Kubernetes Pipeline", b);