[BOOT 5177] Simplify service filter & support multiple periods in names (#633)

* Handle service names with multiple periods

The current awk filter produces truncated output if the service
name contains multiple periods.

eg. dbus-org.freedesktop.resolve1.service and
dbus-org.freedesktop.network1.service both appear as 'dbus-org' in
the resulting service list.

This change addresses this by filtering on '.service' instead.

* Simplify systemd service filtering

Added systemctl switches to filter the output based on enabled
or running services. This removes the need for one of the awk
statements.

include/tests_boot_services

@@ -564,7 +564,7 @@
             LogText "Result: systemctl binary found, trying that to discover information"
             # Running services
             LogText "Searching for running services (systemctl services only)"
-            FIND=$(${SYSTEMCTLBINARY} --full --type=service | ${AWKBINARY} '{ if ($4=="running") { print $1 } }' | ${AWKBINARY} -F. '{ print $1 }')
+            FIND=$(${SYSTEMCTLBINARY} --no-legend --full --type=service --state=running | ${AWKBINARY} -F.service '{ print $1 }')
             COUNT=0
             Report "running_service_tool=systemctl"
             for ITEM in ${FIND}; do
@@ -579,7 +579,7 @@
 
             # Services at boot
             LogText "Searching for enabled services (systemctl services only)"
-            FIND=$(${SYSTEMCTLBINARY} list-unit-files --type=service | ${SORTBINARY} -u | ${AWKBINARY} '{ if ($2=="enabled") { print $1 } }' | ${AWKBINARY} -F. '{ print $1 }')
+            FIND=$(${SYSTEMCTLBINARY} list-unit-files --no-legend --type=service --state=enabled | ${SORTBINARY} -u | ${AWKBINARY} -F.service '{ print $1 }')
             COUNT=0
             Report "boot_service_tool=systemctl"
             for ITEM in ${FIND}; do