Correct check for condition severity

Author: rjeberhard

operator/src/main/java/oracle/kubernetes/operator/DomainStatusUpdater.java

@@ -581,7 +581,7 @@ private void addFailureCondition(DomainStatus status, DomainCondition condition)
     }
 
     private boolean hasReachedRetryLimit(DomainStatus status, DomainCondition condition) {
-      return condition.getSeverity() == SEVERE
+      return (condition.getSeverity() == null || condition.getSeverity() == SEVERE)
           && status.getInitialFailureTime() != null
           && status.getMinutesFromInitialToLastFailure() >= getDomain().getFailureRetryLimitMinutes();
     }

operator/src/main/java/oracle/kubernetes/weblogic/domain/model/DomainCondition.java

@@ -243,7 +243,7 @@ public boolean hasType(DomainConditionType type) {
   }
 
   public boolean isRetriableFailure() {
-    return getType() == FAILED && getSeverity() == SEVERE;
+    return getType() == FAILED && (getSeverity() == null || getSeverity() == SEVERE);
   }
 
   boolean isMarkedForDeletion() {