Deb: move clusters.json from aurora-executor to aurora-tools package.

Reviewed at https://reviews.apache.org/r/37924/
diff --git a/specs/debian/aurora-executor.install b/specs/debian/aurora-executor.install
index 5d0d1f7..2508dd8 100644
--- a/specs/debian/aurora-executor.install
+++ b/specs/debian/aurora-executor.install
@@ -1,5 +1,3 @@
 dist/thermos_executor.pex /usr/share/aurora/bin
 dist/thermos_observer.pex /usr/share/aurora/bin
 dist/thermos.pex /usr/share/aurora/bin
-
-debian/clusters.json /etc/aurora
diff --git a/specs/debian/aurora-tools.install b/specs/debian/aurora-tools.install
index ac8d032..553902c 100644
--- a/specs/debian/aurora-tools.install
+++ b/specs/debian/aurora-tools.install
@@ -1,2 +1,4 @@
 dist/kaurora_admin.pex /usr/share/aurora/bin
 dist/kaurora.pex /usr/share/aurora/bin
+
+debian/clusters.json /etc/aurora