Problem with Adaptive Hint is inaccessible

There were no label added for problem with adaptive hint so for the question
added the label and insteat of using for attribute used the label as the
parent of input field

TNL-1074

common/lib/xmodule/xmodule/templates/problem/problem_with_hint.yaml

@@ -36,13 +36,14 @@ data: |
         hint = "<font color='blue'>Hint: {0}</font>".format(hint)
         new_cmap.set_hint_and_mode(aid,hint,'always')
     </script>
-        <p>
-    What is the best programming language that exists today? You may enter your answer in upper or lower case, with or without quotes. </p>
+        <label>
+    What is the best programming language that exists today? You may enter your answer in upper or lower case, with or without quotes.
         <p>
           <customresponse cfn="test_str" expect="python">
             <textline correct_answer="python" label="What is the best programming language that exists today?"/>
             <hintgroup hintfn="hint_fn"/>
           </customresponse>
         </p>
+        </label>
       </text>
     </problem>

common/lib/xmodule/xmodule/templates/problem/problem_with_hint_in_latex.yaml

@@ -81,13 +81,14 @@ data: |
         hint = "<font color='blue'>Hint: {0}</font>".format(hint)
         new_cmap.set_hint_and_mode(aid,hint,'always')
     </script>
-        <p>
-    What is the best programming language that exists today? You may enter your answer in upper or lower case, with or without quotes. </p>
+        <label>
+    What is the best programming language that exists today? You may enter your answer in upper or lower case, with or without quotes.
         <p>
           <customresponse cfn="test_str" expect="python">
             <textline correct_answer="python" label="What is the best programming language that exists today?"/>
             <hintgroup hintfn="hint_fn"/>
           </customresponse>
         </p>
+        </label>
       </text>
     </problem>