Fix test failing due to optimized out xml

Somewhere between python2.7 and python3.4 etree started dropping the xml
header when defaults will suffice. This test was relying on it being
there.

Author: SpamapS

tests/test_42_enc.py

@@ -9,8 +9,8 @@
 
 __author__ = 'roland'
 
-TMPL = """<?xml version='1.0' encoding='UTF-8'?>
-<ns0:EncryptedData xmlns:ns0="http://www.w3.org/2001/04/xmlenc#" xmlns:ns1="http://www.w3.org/2000/09/xmldsig#" Id="ED" Type="http://www.w3.org/2001/04/xmlenc#Element"><ns0:EncryptionMethod Algorithm="http://www.w3.org/2001/04/xmlenc#tripledes-cbc" /><ns1:KeyInfo><ns0:EncryptedKey Id="EK"><ns0:EncryptionMethod Algorithm="http://www.w3.org/2001/04/xmlenc#rsa-1_5" /><ns1:KeyInfo><ns1:KeyName>my-rsa-key</ns1:KeyName></ns1:KeyInfo><ns0:CipherData><ns0:CipherValue /></ns0:CipherData></ns0:EncryptedKey></ns1:KeyInfo><ns0:CipherData><ns0:CipherValue /></ns0:CipherData></ns0:EncryptedData>"""
+TMPL_NO_HEADER = """<ns0:EncryptedData xmlns:ns0="http://www.w3.org/2001/04/xmlenc#" xmlns:ns1="http://www.w3.org/2000/09/xmldsig#" Id="ED" Type="http://www.w3.org/2001/04/xmlenc#Element"><ns0:EncryptionMethod Algorithm="http://www.w3.org/2001/04/xmlenc#tripledes-cbc" /><ns1:KeyInfo><ns0:EncryptedKey Id="EK"><ns0:EncryptionMethod Algorithm="http://www.w3.org/2001/04/xmlenc#rsa-1_5" /><ns1:KeyInfo><ns1:KeyName>my-rsa-key</ns1:KeyName></ns1:KeyInfo><ns0:CipherData><ns0:CipherValue /></ns0:CipherData></ns0:EncryptedKey></ns1:KeyInfo><ns0:CipherData><ns0:CipherValue /></ns0:CipherData></ns0:EncryptedData>"""
+TMPL = "<?xml version='1.0' encoding='UTF-8'?>\n%s" % TMPL_NO_HEADER
 
 IDENTITY = {"eduPersonAffiliation": ["staff", "member"],
             "surName": ["Jeter"], "givenName": ["Derek"],
@@ -27,7 +27,7 @@
 def test_pre_enc():
     tmpl = pre_encryption_part()
     print(tmpl)
-    assert "%s" % tmpl == TMPL
+    assert "%s" % tmpl in (TMPL_NO_HEADER, TMPL)
 
 
 def test_reshuffle_response():