test: add a test to cover restarting services in reloading state

Cover the case where a service is recovered out of reloading state via
a restart Restart= configuration.

Signed-off-by: Peter Morrow <pemorrow@linux.microsoft.com>

test/TEST-59-RELOADING-RESTART/Makefile

@@ -0,0 +1 @@
+../TEST-01-BASIC/Makefile

test/TEST-59-RELOADING-RESTART/test.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+set -e
+TEST_DESCRIPTION="Test auto restart of exited services which are stuck in reloading state"
+
+TEST_NO_QEMU=1
+
+. $TEST_BASE_DIR/test-functions
+
+do_test "$@" 59