Update to gerrit 2.15 stable release

Change-Id: I6b4fc14a8f670bd0535dae70fa2a61d86befdd83
diff --git a/docker/centos7/Makefile b/docker/centos7/Makefile
index 8ed2658..3bcf250 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=2.15.rc2
+VERSION=2.15
 RELEASE=1
 REPO_VERSION=1
 REPO_RELEASE=2
diff --git a/docker/ubuntu16.04/Makefile b/docker/ubuntu16.04/Makefile
index 552664d..aa72ad6 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=2.15.rc2
+VERSION=2.15
 RELEASE=1
 VENDOR=GerritForge
 VENDOR_LC=$(shell echo $(VENDOR) | tr A-Z a-z)
diff --git a/fpm/Makefile b/fpm/Makefile
index 19deade..e4452cd 100644
--- a/fpm/Makefile
+++ b/fpm/Makefile
@@ -1,5 +1,5 @@
-VERSION=2.15.rc2
-URL=https://gerrit-releases.storage.googleapis.com/gerrit-2.15-rc2.war
+VERSION=2.15
+URL=https://gerrit-releases.storage.googleapis.com/gerrit-2.15.war
 CI_URL=https://gerrit-ci.gerritforge.com
 RELEASE=1
 
diff --git a/macOS/Makefile b/macOS/Makefile
index 118b10e..e69b995 100644
--- a/macOS/Makefile
+++ b/macOS/Makefile
@@ -1,4 +1,4 @@
-VERSION := 2.15.rc2
+VERSION := 2.15
 
 all: server