adhocfilters: minor escape change

public/app/features/templating/adhoc_variable.ts

@@ -67,11 +67,11 @@ export class AdhocVariable implements Variable {
   }
 
   escapeDelimiter(value) {
-    return value.replace('|', '__gfpipe');
+    return value.replace('|', '__gfp__');
   }
 
   unescapeDelimiter(value) {
-    return value.replace('__gfpipe', '|');
+    return value.replace('__gfp__', '|');
   }
 
   setFilters(filters: any[]) {

public/app/features/templating/specs/adhoc_variable_specs.ts

@@ -15,7 +15,7 @@ describe('AdhocVariable', function() {
         ]
       });
       var urlValue = variable.getValueForUrl();
-      expect(urlValue).to.eql(["key1|=|value1", "key2|!=|value2", "key3|=|value3a__gfpipevalue3b"]);
+      expect(urlValue).to.eql(["key1|=|value1", "key2|!=|value2", "key3|=|value3a__gfp__value3b"]);
     });
 
   });
@@ -24,7 +24,7 @@ describe('AdhocVariable', function() {
 
     it('should restore filters', function() {
       var variable = new AdhocVariable({});
-      variable.setValueFromUrl(["key1|=|value1", "key2|!=|value2", "key3|=|value3a__gfpipevalue3b"]);
+      variable.setValueFromUrl(["key1|=|value1", "key2|!=|value2", "key3|=|value3a__gfp__value3b"]);
 
       expect(variable.filters[0].key).to.be('key1');
       expect(variable.filters[0].operator).to.be('=');