Use proper paths in mapper services

Using /usr/bin/env is now an antipattern.

Signed-off-by: Matt Spinler <spinler@us.ibm.com>
Change-Id: I18c05ea0f962b989ecbedc8019f63f673cb4b9ef
diff --git a/meta-phosphor/recipes-phosphor/dbus/phosphor-mapper/xyz.openbmc_project.ObjectMapper.service b/meta-phosphor/recipes-phosphor/dbus/phosphor-mapper/xyz.openbmc_project.ObjectMapper.service
index 5f7bd95..d57ec31 100644
--- a/meta-phosphor/recipes-phosphor/dbus/phosphor-mapper/xyz.openbmc_project.ObjectMapper.service
+++ b/meta-phosphor/recipes-phosphor/dbus/phosphor-mapper/xyz.openbmc_project.ObjectMapper.service
@@ -6,11 +6,10 @@
 [Service]
 Restart=always
 Type=dbus
-ExecStart=/usr/bin/env mapperx \
+ExecStart=/usr/bin/mapperx \
         --service-namespaces="${{MAPPER_SERVICES}}" \
         --interface-namespaces="${{MAPPER_INTERFACES}}" \
         --service-blacklists="${{MAPPER_SERVICEBLACKLISTS}}"
-SyslogIdentifier=phosphor-mapper
 BusName={BUSNAME}
 TimeoutStartSec=300
 RestartSec=5