Merge pull request #5480 from edx/jmclaus/change-default-post-to-discussion

Changed default post type to discussion.

lms/templates/discussion/_underscore_templates.html

@@ -443,13 +443,13 @@
                 ## select a forum post type
                 ${_("Post type:")}
             </span><fieldset class="field-input">
-                <input type="radio" name="${"<%= form_id %>"}-post-type" class="post-type-input" id="${"<%= form_id %>"}-post-type-question" value="question" checked>
+                <input type="radio" name="${"<%= form_id %>"}-post-type" class="post-type-input" id="${"<%= form_id %>"}-post-type-question" value="question">
                 <label for="${"<%= form_id %>"}-post-type-question" class="post-type-label">
                     <i class="icon icon-question"></i>
                     ## Translators: This is a forum post type
                     ${_("Question")}
                 </label>
-                <input type="radio" name="${"<%= form_id %>"}-post-type" class="post-type-input" id="${"<%= form_id %>"}-post-type-discussion" value="discussion">
+                <input type="radio" name="${"<%= form_id %>"}-post-type" class="post-type-input" id="${"<%= form_id %>"}-post-type-discussion" value="discussion" checked>
                 <label for="${"<%= form_id %>"}-post-type-discussion" class="post-type-label">
                     <i class="icon icon-comments"></i>
                     ## Translators: This is a forum post type