Update authn_request.py

Values can be 0,1 empty string etc when stored in the database or in data conversion it's not required to be  True/False specifically

Author: HichamDz38

src/onelogin/saml2/authn_request.py

@@ -97,10 +97,10 @@ def __init__(self, settings, force_authn=False, is_passive=False, set_nameid_pol
             )
 
         requested_authn_context_str = ""
-        if security["requestedAuthnContext"] is not False:
+        if not security["requestedAuthnContext"]:
             authn_comparison = security["requestedAuthnContextComparison"]
 
-            if security["requestedAuthnContext"] is True:
+            if security["requestedAuthnContext"]:
                 requested_authn_context_str = (
                     """    <samlp:RequestedAuthnContext Comparison="%s">
         <saml:AuthnContextClassRef>urn:oasis:names:tc:SAML:2.0:ac:classes:PasswordProtectedTransport</saml:AuthnContextClassRef>