Always initialize ccache when storing.
    
    If we do not initialize the ccache additional entries will pile up and the
    code that retrieves the encrypted credentials will end up sourcing old,
    expired creds instead of the latest ones. Plues storage size may grow
    indefinitely.
    
    Signed-off-by: Simo Sorce <simo@redhat.com>
    Reviewed-by: Robbie Harwood <rharwood@redhat.com>
    Merges #35