Merge pull request #1850 from jedwards4b/fix_error_message

fix error message

Do not print message about leaving case directory if the directory was never created

Test suite: hand tests of create_newcase
Test baseline:
Test namelist changes:
Test status: bit for bit
Fixes #1824

User interface changes?:

Update gh-pages html (Y/N)?:

Code review:

scripts/lib/CIME/case.py

@@ -1472,10 +1472,11 @@ def create(self, casename, srcroot, compset_name, grid_name, user_mods_dir=None,
             # Lock env_case.xml
             lock_file("env_case.xml", self._caseroot)
         except:
-            if os.path.exists(self._caseroot) and not logger.isEnabledFor(logging.DEBUG) and not test:
-                logger.warn("Failed to setup case, removing {}\nUse --debug to force me to keep caseroot".format(self._caseroot))
-                shutil.rmtree(self._caseroot)
-            else:
-                logger.warn("Leaving broken case dir {}".format(self._caseroot))
+            if os.path.exists(self._caseroot):
+                if not logger.isEnabledFor(logging.DEBUG) and not test:
+                    logger.warn("Failed to setup case, removing {}\nUse --debug to force me to keep caseroot".format(self._caseroot))
+                    shutil.rmtree(self._caseroot)
+                else:
+                    logger.warn("Leaving broken case dir {}".format(self._caseroot))
 
             raise