systemd: use qualified paths

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: Ia2c78f0d39982754f1758b2e6bd89cd8b3591c0d
diff --git a/src/ibm/hypervisor-network-mgr-src/xyz.openbmc_project.Network.Hypervisor.service.in b/src/ibm/hypervisor-network-mgr-src/xyz.openbmc_project.Network.Hypervisor.service.in
index 7bfa7a5..54604ed 100644
--- a/src/ibm/hypervisor-network-mgr-src/xyz.openbmc_project.Network.Hypervisor.service.in
+++ b/src/ibm/hypervisor-network-mgr-src/xyz.openbmc_project.Network.Hypervisor.service.in
@@ -3,7 +3,7 @@
 After=xyz.openbmc_project.biosconfig_manager.service
 
 [Service]
-ExecStart=/usr/bin/env hyp-network-manager
+ExecStart=/usr/bin/hyp-network-manager
 SyslogIdentifier=hyp-network-manager
 Restart=always
 Type=dbus
diff --git a/xyz.openbmc_project.Network.service.in b/xyz.openbmc_project.Network.service.in
index 5b8ae01..044b78f 100644
--- a/xyz.openbmc_project.Network.service.in
+++ b/xyz.openbmc_project.Network.service.in
@@ -4,7 +4,7 @@
 After=systemd-networkd.service
 
 [Service]
-ExecStart=/usr/bin/env phosphor-network-manager
+ExecStart=/usr/bin/phosphor-network-manager
 SyslogIdentifier=phosphor-network-manager
 Restart=always
 Type=dbus