Add chmod to make file removal after tests more reliable.

MacOS does not allow files to be removed recursively unless the owner has write and execute permissions on all the directories.

Some tests leave the permissions in a bad state so fix them up before trying to delete.

test/lib/pgBackRestTest/Common/JobTest.pm

@@ -701,7 +701,7 @@ sub end
                 containerRemove("test-$self->{iVmIdx}");
             }
 
-            executeTest("rm -rf ${strHostTestPath}");
+            executeTest("chmod -R 700 ${strHostTestPath}/* 2>&1;rm -rf ${strHostTestPath}");
         }
 
         $bDone = true;