Move systemctl files to /init/ rather than /systemd/

The SitePathInitializer class expects to find these resources in the
same package as itself.

Since we don't actually have any classes under /systemd/ let's just
move the resources into /init/ so we don't have to do any gnarly class
name manipulations to get the resources from SitePathInitializer.

Change-Id: I4fcd0a15385d9955ea60f115e9f6d222c7e8a10a
diff --git a/gerrit-pgm/src/main/resources/com/google/gerrit/pgm/systemd/gerrit.service b/gerrit-pgm/src/main/resources/com/google/gerrit/pgm/init/gerrit.service
similarity index 100%
rename from gerrit-pgm/src/main/resources/com/google/gerrit/pgm/systemd/gerrit.service
rename to gerrit-pgm/src/main/resources/com/google/gerrit/pgm/init/gerrit.service
diff --git a/gerrit-pgm/src/main/resources/com/google/gerrit/pgm/systemd/gerrit.socket b/gerrit-pgm/src/main/resources/com/google/gerrit/pgm/init/gerrit.socket
similarity index 100%
rename from gerrit-pgm/src/main/resources/com/google/gerrit/pgm/systemd/gerrit.socket
rename to gerrit-pgm/src/main/resources/com/google/gerrit/pgm/init/gerrit.socket