Openshift redirects wp-admin to https

In general option in wordpress, I have changed the wordpress directory to be on http://mywebsite.com but wordpress dashboard is still in htpps causing mixed content warning and images in dashboard are not displayed even after disabling mixed content filter on firefox.

I this is my .htaccess file

Options +FollowSymlinks

<IfModule mod_rewrite.c>
    RewriteEngine On

    RewriteCond %{SERVER_PORT} ^443$
    RewriteRule ^(.*)$ http://%{HTTP_HOST}/$1 [R=301,L]

    # BEGIN WordPress
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule . /index.php [L]
    # END WordPress
</IfModule>

What is the possible solution to overcome this problem.