Corrected the Settings service name

Corrected service name from  "xyz.openbmc_project.Settings"
to "xyz.openbmc_project.settings" in exitairsensor.service.

This causes EntityManager service restart fails via systemctl.

Tested:
Restarted the EntityManager using systemctl and works fine.

Change-Id: I99e9ba2f23e30e776d833845ea6acdc0b4cd2617
Signed-off-by: AppaRao Puli <apparao.puli@linux.intel.com>
diff --git a/service_files/xyz.openbmc_project.exitairsensor.service b/service_files/xyz.openbmc_project.exitairsensor.service
index a799c5b..ac7cac2 100644
--- a/service_files/xyz.openbmc_project.exitairsensor.service
+++ b/service_files/xyz.openbmc_project.exitairsensor.service
@@ -1,8 +1,8 @@
 [Unit]
 Description=Exit Air Temp Sensor
 StopWhenUnneeded=false
-Requires=xyz.openbmc_project.Settings.service
-After=xyz.openbmc_project.Settings.service
+Requires=xyz.openbmc_project.settings.service
+After=xyz.openbmc_project.settings.service
 Requires=xyz.openbmc_project.EntityManager.service
 After=xyz.openbmc_project.EntityManager.service