Add method attribute to make sure login, registration, password_reset, and…

Add method attribute to make sure login, registration, password_reset, and financial_assistance forms are always submitted via POST. SEC-223

lms/templates/financial-assistance/financial_assessment_form.underscore

@@ -6,7 +6,7 @@
   <%  }); %>
 </div>
 
-<form class="financial-assistance-form">
+<form class="financial-assistance-form" method="POST">
 	<div class="status submission-error hidden" aria-live="polite">
 	    <h4 class="message-title"><%- gettext('Unable to submit application') %></h4>
 	    <ul class="message-copy"></ul>

lms/templates/student_account/login.underscore

@@ -26,7 +26,7 @@
     </div>
 <% } %>
 
-<form id="login" class="login-form" tabindex="-1">
+<form id="login" class="login-form" tabindex="-1" method="POST">
 
     <div class="section-title lines">
         <h2>

lms/templates/student_account/password_reset.underscore

@@ -3,7 +3,7 @@
     <ul class="message-copy"></ul>
 </div>
 
-<form id="password-reset" class="password-reset-form" tabindex="-1">
+<form id="password-reset" class="password-reset-form" tabindex="-1" method="POST">
 
     <div class="section-title lines">
         <h2>

lms/templates/student_account/register.underscore

@@ -3,7 +3,7 @@
     <ul class="message-copy"></ul>
 </div>
 
-<form id="register" class="register-form" autocomplete="off" tabindex="-1">
+<form id="register" class="register-form" autocomplete="off" tabindex="-1" method="POST">
 
     <% if (context.errorMessage) { %>
         <div class="status submission-error">