Set Gerrit to v2.15.rc1

Change-Id: Idef6528d13ca03fac5e2354f73d12f3915438fd2
diff --git a/docker/centos7/Makefile b/docker/centos7/Makefile
index a9863ea..1412370 100644
--- a/docker/centos7/Makefile
+++ b/docker/centos7/Makefile
@@ -1,7 +1,7 @@
 # Customise the following variable as Make parameters
 # to produce a yum.repo for a VENDOR distribution
 # Default values are pointing to GerritForge (www.gerritforge.com)
-VERSION=2.14.4
+VERSION=2.15.rc1
 RELEASE=1
 REPO_VERSION=1
 REPO_RELEASE=2
diff --git a/docker/ubuntu16.04/Makefile b/docker/ubuntu16.04/Makefile
index 91bc81b..71b0f13 100644
--- a/docker/ubuntu16.04/Makefile
+++ b/docker/ubuntu16.04/Makefile
@@ -1,7 +1,7 @@
 # Customise the following variable as Make parameters
 # to produce a yum.repo for a VENDOR distribution
 # Default values are pointing to GerritForge (www.gerritforge.com)
-VERSION=2.14.4
+VERSION=2.15.rc1
 RELEASE=1
 VENDOR=GerritForge
 VENDOR_LC=$(shell echo $(VENDOR) | tr A-Z a-z)
diff --git a/fpm/Makefile b/fpm/Makefile
index 9b98abf..1a2b4b3 100644
--- a/fpm/Makefile
+++ b/fpm/Makefile
@@ -1,5 +1,5 @@
-VERSION=2.14.4
-URL=https://gerrit-releases.storage.googleapis.com/gerrit-$(VERSION).war
+VERSION=2.15.rc1
+URL=https://gerrit-releases.storage.googleapis.com/gerrit-2.15-rc1.war
 CI_URL=https://gerrit-ci.gerritforge.com
 RELEASE=1
 
diff --git a/macOS/Makefile b/macOS/Makefile
index 511fcff..bf8822a 100644
--- a/macOS/Makefile
+++ b/macOS/Makefile
@@ -1,4 +1,4 @@
-VERSION := 2.14.4
+VERSION := 2.15.rc1
 
 all: server