Cirrus: Simplify optional system-test script

Previously it was required to call the verify, unit, and integration
scripts in order to build/install dependencies, and libpod.  This
wastes time during the (optional) system-testing, since the
actual unit/integration testing is also happening in parallel.

Consolidate only the distribution-specific build steps into the
system-testing script.  This way, only the required steps are performed
in their respective (parallel) tasks.

Signed-off-by: Chris Evich <cevich@redhat.com>

contrib/cirrus/optional_system_test.sh

@@ -1,16 +0,0 @@
-#!/bin/bash
-
-set -e
-source $(dirname $0)/lib.sh
-
-req_env_var "
-GOSRC $GOSRC
-OS_RELEASE_ID $OS_RELEASE_ID
-OS_RELEASE_VER $OS_RELEASE_VER
-"
-
-show_env_vars
-
-set -x
-cd "$GOSRC"
-make localsystem

contrib/cirrus/system_test.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+
+set -e
+source $(dirname $0)/lib.sh
+
+req_env_var "
+GOSRC $GOSRC
+OS_RELEASE_ID $OS_RELEASE_ID
+OS_RELEASE_VER $OS_RELEASE_VER
+"
+
+show_env_vars
+
+set -x
+cd "$GOSRC"
+
+case "${OS_RELEASE_ID}-${OS_RELEASE_VER}" in
+    ubuntu-18)
+        make install.tools "BUILDTAGS=$BUILDTAGS"
+        make "BUILDTAGS=$BUILDTAGS"
+        make test-binaries "BUILDTAGS=$BUILDTAGS"
+        ;;
+    fedora-28) ;&
+    centos-7) ;&
+    rhel-7)
+        make install.tools
+        make
+        make test-binaries
+        ;;
+    *) bad_os_id_ver ;;
+esac
+
+make localsystem