VTL: Use latest version of syslog_rfc5424_parser (0.2.0) released: 190117

VTL: Use latest version of syslog_rfc5424_parser (0.2.0) released: 190117

Upstream changes not compatable with: https://gerrit.fd.io/r/#/c/16797/

Running tests using custom test runner
Active filters: file=test_syslog.py, class=None, function=None
Adding tests from directory tree /vpp/test
1 out of 914 tests match specified filters
Not running extended tests (some tests will be skipped)
==============================================================================
Syslog Protocol Test Cases
==============================================================================
Syslog Protocol test                                                     OK

==============================================================================
TEST RESULTS:
     Scheduled tests: 1
      Executed tests: 1
        Passed tests: 1
==============================================================================

Test run was successful

Change-Id: I42f86ae3e7f062c0343025ba16bc6e8d2c34ed50
Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>
(cherry picked from commit 5011c67058c3c37d344c5d83ab6046700327b7b4)