Added an explicit dependency on svn. Under py3 it can be installed with pip, and doesn't need OS packages for python-subversion (it still needs libsvn1, though).

 - Legacy-Id: 17664

Author: levkowetz

requirements.txt

@@ -61,6 +61,7 @@ rfc2html>=2.0.1
 selenium>=2.42,<3.8.1
 six>=1.9.0
 sqlparse>=0.2.2
+svn>=1.0.1
 tblib>=1.3.0
 tqdm>=3.7.0
 #Trac>=1.0.10,<1.2