[install] Add missing requests to requirements
@@ -14,6 +14,7 @@ pycurl==7.43.0
pyOpenSSL==16.2.0
python-owasp-zap-v2.4==0.0.8
PyVirtualDisplay==0.2.1
+requests==2.17.3
# We donot use six directly, but there is an error while trying to install pyOpenSSL.
# More details at https://github.com/owtf/owtf/issues/332
six==1.10.0
