nfs-utils: systemd fixes

- Start daemons by default like the initscripts do, but only if
  /etc/exports exists.
- Inform systemd.bbclass about nfs-utils-client package.

(From OE-Core rev: 94602d8ced3a8fd033de93b47320c94db6de8755)

Signed-off-by: Andreas Oberritter <obi@opendreambox.org>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-connectivity/nfs-utils/nfs-utils/nfs-mountd.service

@@ -2,6 +2,7 @@
 Description=NFS Mount Daemon
 After=rpcbind.service nfs-server.service
 Requires=rpcbind.service nfs-server.service
+ConditionPathExists=@SYSCONFDIR@/exports
 
 [Service]
 EnvironmentFile=-@SYSCONFDIR@/nfs-utils.conf

meta/recipes-connectivity/nfs-utils/nfs-utils/nfs-server.service

@@ -2,6 +2,7 @@
 Description=NFS Server
 Requires=rpcbind.service nfs-mountd.service
 After=rpcbind.service
+ConditionPathExists=@SYSCONFDIR@/exports
 
 [Service]
 Type=oneshot

meta/recipes-connectivity/nfs-utils/nfs-utils_1.3.4.bb

@@ -48,9 +48,9 @@ INITSCRIPT_PARAMS_${PN}-client = "defaults 19 21"
 
 inherit autotools-brokensep update-rc.d systemd pkgconfig
 
+SYSTEMD_PACKAGES = "${PN} ${PN}-client"
 SYSTEMD_SERVICE_${PN} = "nfs-server.service nfs-mountd.service"
 SYSTEMD_SERVICE_${PN}-client = "nfs-statd.service"
-SYSTEMD_AUTO_ENABLE = "disable"
 
 # --enable-uuid is need for cross-compiling
 EXTRA_OECONF = "--with-statduser=rpcuser \