RPM spec: remove -ce suffix from distribution_based_engine JSON

Noticed this failing in internal e2e tests on CentOS:

```
sudo docker engine activate --license /tmp/docker.lic
unable to determine the installed engine version. Specify which engine image to update with --engine-image: open /var/lib/docker-engine/distribution_based_engine.json: no such file or directory
```

Looks lik 09b3ac8 changed the name of this
file from `distribution_based_engine-ce.json` to `distribution_based_engine.json`
(without `-ce` suffix) for the `.deb` packages, but did not update
the RPM packages accordingly.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
(cherry picked from commit 77878ff)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Upstream-commit: 2dd0ad14545c6b79ddc3b101556852d304f153f9
Component: packaging

Author: thaJeztah

components/packaging/rpm/SPECS/docker-ce.spec

@@ -104,15 +104,15 @@ install -D -m 0644 %{_topdir}/SOURCES/docker.service $RPM_BUILD_ROOT/%{_unitdir}
 install -D -m 0644 %{_topdir}/SOURCES/docker.socket $RPM_BUILD_ROOT/%{_unitdir}/docker.socket
 
 # install json for docker engine activate / upgrade
-install -D -m 0644 %{_topdir}/SOURCES/distribution_based_engine.json $RPM_BUILD_ROOT/var/lib/docker-engine/distribution_based_engine-ce.json
+install -D -m 0644 %{_topdir}/SOURCES/distribution_based_engine.json $RPM_BUILD_ROOT/var/lib/docker-engine/distribution_based_engine.json
 
 %files
 /%{_bindir}/dockerd
 /%{_bindir}/docker-proxy
 /%{_bindir}/docker-init
 /%{_unitdir}/docker.service
 /%{_unitdir}/docker.socket
-/var/lib/docker-engine/distribution_based_engine-ce.json
+/var/lib/docker-engine/distribution_based_engine.json
 
 %post
 %systemd_post docker.service