test: GitUtilTest, don't sign commits

Signed-off-by: Marc Nuri <marc@marcnuri.com>

jkube-kit/common/src/test/java/org/eclipse/jkube/kit/common/util/GitUtilTest.java

@@ -134,7 +134,7 @@ private Git createDummyGitRepository(File gitFolder) throws GitAPIException, URI
     Git git = Git.init().setDirectory(gitFolder).setInitialBranch("test-branch").call();
     git.add().addFilepattern(".").call();
     git.remoteAdd().setName("origin").setUri(new URIish("https://example.com/origin.git")).call();
-    git.commit().setMessage("Initial commit").call();
+    git.commit().setMessage("Initial commit").setSign(false).call();
     return git;
   }
 }