Pass first name and last name together and fix code to not get social_title...

Pass first name and last name together and fix code to not get social_title when not exists. It can happens when the context is a Organisation.

bt5/erp5_crm/SkinTemplateItem/portal_skins/erp5_crm/Entity_getDefaultSubstitutionDictFromEvent.xml

@@ -50,9 +50,8 @@
         </item>
         <item>
             <key> <string>_body</string> </key>
-            <value> <string>return {"social_title" : context.getSocialTitleTranslatedTitle(),\n
-  "first_name": context.getFirstName(),\n
-  "last_name": context.getLastName()\n
+            <value> <string>return {"social_title" : getattr(context, \'getSocialTitleTranslatedTitle\', \'\'),\n
+  "title": context.getTitle(),\n
 }\n
 </string> </value>
         </item>

bt5/erp5_crm/bt/revision

-607
\ No newline at end of file
+608
\ No newline at end of file