fix for hostname RFC compliance

Signed-off-by: Abhishek Kumar <abhishek.mrt22@gmail.com>

Author: shwstppr

server/src/main/java/org/apache/cloudstack/ingestion/VmIngestionManagerImpl.java

@@ -289,12 +289,12 @@ public UserVmResponse importUnmanagedInstance(ImportUnmanageInstanceCmd cmd) {
         }
         String hostName = cmd.getHostName();
         if (Strings.isNullOrEmpty(hostName)) {
-            if (NetUtils.verifyDomainNameLabel(instanceName, true)) {
+            if (!NetUtils.verifyDomainNameLabel(instanceName, true)) {
                 throw new InvalidParameterValueException(String.format("Please provide hostname for the VM. VM name contains unsupported characters for it to be used as hostname"));
             }
             hostName = instanceName;
         }
-        if (NetUtils.verifyDomainNameLabel(hostName, true)) {
+        if (!NetUtils.verifyDomainNameLabel(hostName, true)) {
             throw new InvalidParameterValueException("Invalid VM hostname. VM hostname can contain ASCII letters 'a' through 'z', the digits '0' through '9', "
                     + "and the hyphen ('-'), must be between 1 and 63 characters long, and can't start or end with \"-\" and can't start with digit");
         }