Add an openSUSE Tumbleweed devstack non-voting check job

This adds the necessary fixes to pass a devstack run
on openSUSE Tumbleweed. Also removes opensuse 42.2 as it
is EOL for some time already and no longer actively tested
in the OpenStack infra.

Depends-On: I1b68c08c07cf6653ea58506f738cbe0054b38f3a
Change-Id: I2894482deef063fd02b0818c695a2ddbf6767039
diff --git a/tools/install_pip.sh b/tools/install_pip.sh
index dbe5278..1bd7392 100755
--- a/tools/install_pip.sh
+++ b/tools/install_pip.sh
@@ -129,10 +129,10 @@
 
 # Eradicate any and all system packages
 
-# Python in fedora depends on the python-pip package so removing it
+# Python in fedora/suse depends on the python-pip package so removing it
 # results in a nonfunctional system. pip on fedora installs to /usr so pip
 # can safely override the system pip for all versions of fedora
-if ! is_fedora ; then
+if ! is_fedora  && ! is_suse; then
     uninstall_package python-pip
     uninstall_package python3-pip
 fi