Make the getLoaderMap static since the cache is static.

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@270295 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/taskdefs/SQLExec.java

@@ -768,7 +768,7 @@ public class SQLExec extends Task {
         }
     }
 
-    protected Hashtable getLoaderMap(){
+    protected static Hashtable getLoaderMap(){
         return loaderMap;
     }