suggested solution timestamp issue for student role lti integration with blackboard learn

Suggested solution for https://groups.google.com/forum/#!topic/bigbluebutton-dev/2q43YPSAu0o

bbb-lti/grails-app/views/tool/index.gsp

@@ -30,6 +30,9 @@
                     <g:if test="${ismoderator}">
                     <th class="header c6 lastcol" style="text-align:center;" scope="col"><g:message code="tool.view.actions" /></th>
                     </g:if>
+                    <g:else>
+                    <th class="header c5 lastcol" style="text-align:center;" scope="col"></th>
+                    </g:else>
                 </tr>
             </thead>
             <tbody>
@@ -75,6 +78,10 @@
                       </a>
                     </td>
                     </g:if>
+                     <g:else>
+                        <td class="cell c5 lastcol" style="text-align:center;">
+                        </td>
+                      </g:else>
                 </tr>
                 </g:if>
             </g:each>