-Add warning if about to mkpath but path exists as a non-directory

git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@8863 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd

xCAT-server/lib/xcat/plugins/esx.pm

@@ -3948,6 +3948,10 @@ sub cpNetbootImages {
             }
 
             if (! -d $destDir) {
+                if ( -e $destDir ) {
+                    xCAT::SvrUtils::sendmsg([1,"Could not copy netboot contents to $destDir, it exists but is not currently a directory"], $output_handler);
+                    return;
+                }
                 mkpath($destDir);
             }