intrusionsensor: systemd: Use qualified path

Fix a documented anti-pattern:
https://github.com/openbmc/docs/blob/master/anti-patterns.md#use-of-usrbinenv-in-systemd-service-files

Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
Change-Id: Iee20d0516a4bd031b861f47c451a2bfccd986bde
diff --git a/service_files/xyz.openbmc_project.intrusionsensor.service b/service_files/xyz.openbmc_project.intrusionsensor.service
index 1730b07..3f815ba 100644
--- a/service_files/xyz.openbmc_project.intrusionsensor.service
+++ b/service_files/xyz.openbmc_project.intrusionsensor.service
@@ -7,8 +7,7 @@
 [Service]
 Restart=always
 RestartSec=5
-ExecStart=/usr/bin/env intrusionsensor
-SyslogIdentifier=intrusion-sensor
+ExecStart=/usr/bin/intrusionsensor
 
 [Install]
 WantedBy=multi-user.target