Added loading spinner on login page
Added loading spinner on login page

Signed-off-by: Thiago Moreira <61421433c41bc6cb03e1aa8318ba6784b50a9224@yahoo.com.br>
Signed-off-by: Clarissa Borges <ca8bbbe3bc9acf7a324c17577b464a55b0f271e5@gmail.com>

MarianaPicolo/2017.1-Forum-Coordenadores-DEG,RomeuCarvalhoAntunes/2017.1-Forum-Coordenadores-DEG