Fix path checks in some tests.

When running ./setup.py test, these two tests were failing to find the
.pem files located in the tests/ directory that they were referencing
without paths.

Other tests use full_path from pathutils to reference files in tests/,
so adjusted these to do similarly, and now they pass.

tests/test_42_enc.py

@@ -4,6 +4,7 @@ from saml2.sigver import pre_encryption_part, ASSERT_XPATH, EncryptError
 from saml2.sigver import CryptoBackendXmlSec1
 from saml2.sigver import pre_encrypt_assertion
 from pathutils import xmlsec_path
+from pathutils import full_path
 
 __author__ = 'roland'
 
@@ -65,7 +66,7 @@ def test_enc1():
     # data_file.close()
 
     key_type = "des-192"
-    com_list = [xmlsec_path, "encrypt", "--pubkey-cert-pem", "pubkey.pem",
+    com_list = [xmlsec_path, "encrypt", "--pubkey-cert-pem", full_path("pubkey.pem"),
                 "--session-key", key_type, "--xml-data", data,
                 "--node-xpath", ASSERT_XPATH]
 
@@ -89,7 +90,7 @@ def test_enc2():
         IDENTITY, "id12", "http://lingon.catalogix.se:8087/",
         "urn:mace:example.com:saml:roland:sp", name_id=name_id)
 
-    enc_resp = crypto.encrypt_assertion(resp_, "pubkey.pem",
+    enc_resp = crypto.encrypt_assertion(resp_, full_path("pubkey.pem"),
                                         pre_encryption_part())
 
     print enc_resp

tests/test_82_pefim.py

@@ -9,6 +9,7 @@ from saml2.extension.pefim import SPCertEnc
 from saml2.samlp import Extensions
 from saml2.samlp import authn_request_from_string
 from saml2.sigver import read_cert_from_file
+from pathutils import full_path
 
 __author__ = 'roland'
 
@@ -17,7 +18,7 @@ conf.load_file("server_conf")
 client = Saml2Client(conf)
 
 # place a certificate in an authn request
-cert = read_cert_from_file("test.pem", "pem")
+cert = read_cert_from_file(full_path("test.pem"), "pem")
 
 spcertenc = SPCertEnc(
     x509_data=ds.X509Data(