Upped the required version of selenium (Minimum Libs test-run failure).

 - Legacy-Id: 17705

Author: levkowetz

requirements.txt

@@ -58,7 +58,7 @@ pytz>=2014.7
 #pyzmail>=1.0.3
 requests!=2.12.*
 rfc2html>=2.0.1
-selenium>=2.42,<3.8.1
+selenium>=3.9.0
 six>=1.10.0
 sqlparse>=0.2.2
 svn>=1.0.1