display First name + last name instead of username: group et contact

Change-Id: I4e1e59694c98a4b981cc8cf9a664b2ca399811e0

jams-react-client/src/components/Drawer/Drawer.js

@@ -106,11 +106,11 @@ export default function TemporaryDrawer(props) {
                 addingToGroup
                     ?
                     <ListItem button key={user.username} onClick={() => {addUserToGroup(user.username)}} >
-                        <AddCircleOutlineIcon style={{ marginRight: "10px"}} /><ListItemText primary={user.username} />
+                        <AddCircleOutlineIcon style={{ marginRight: "10px"}} /><ListItemText primary={user.firstName+" "+user.lastName} />
                     </ListItem>
                     :
                     <ListItem button key={user.username} onClick={() => {addContactToUser(user.jamiId)}} >
-                        <AddCircleOutlineIcon style={{ marginRight: "10px"}} /><ListItemText primary={user.username} />
+                        <AddCircleOutlineIcon style={{ marginRight: "10px"}} /><ListItemText primary={user.firstName+" "+user.lastName} />
                     </ListItem>
 
             ))