VTL: New version of pyparsing breaks tests.
Specify use of version <2.3.1 released Jan 13, 2019
@@ -7,6 +7,8 @@ parameterized>=0.6.1 # BSD
pexpect # ISC
psutil # BSD
pycodestyle # MIT (Expat license) https://pypi.org/project/pycodestyle/
+# used by syslog_rfc5424_parser
+pyparsing<2.3.1 # MIT
scapy==2.4.0; python_version >= '2.7' or python_version >= '3.4' # GPL2 https://github.com/secdev/scapy/blob/master/LICENSE
six # MIT
subprocess32 # PSF
