Upgrade global-jjb to v0.42.1-16-g49914d6

Pull in a change to tox-install.sh that accepts the python version, to
benefit ric-plt-a1-mgr which needs to install tox-pyenv with python3.

Signed-off-by: Lott, Christopher (cl778h) <cl778h@att.com>
Change-Id: I45a6c6692dea192713c0fbb336b8e6986d3ebe05

diff --git a/global-jjb b/global-jjb
index f517210..49914d6 160000 (submodule)
--- a/global-jjb
+++ b/global-jjb
@@ -1 +1 @@
-Subproject commit f5172109fc4ca477ad8e4764f41ef03f43fe0956
+Subproject commit 49914d6b5bc5f50ed1592ee72ad9d62fa68ed3f4