Set Gerrit to 3.0.0-rc1

Change-Id: Idfae03c50a88e6fd5bc888b62a603f21c56cc260

centos/7/Dockerfile

diff --git a/centos/7/Dockerfile b/centos/7/Dockerfile
index 86c91d0..96f0eec 100644
--- a/centos/7/Dockerfile
+++ b/centos/7/Dockerfile
@@ -8,7 +8,7 @@
 # (pre-trans Gerrit script needs to have access to the Java command)
 RUN yum -y install initscripts && \
     yum -y install java-1.8.0-openjdk && \
-    yum -y install gerrit-3.0.0.rc0-1 && rm -f /var/gerrit/etc/{ssh,secure}* && rm -Rf /var/gerrit/git/* && \
+    yum -y install gerrit-3.0.0.rc1-1 && rm -f /var/gerrit/etc/{ssh,secure}* && rm -Rf /var/gerrit/git/* && \
     yum -y clean all
 
 ADD entrypoint.sh /

ubuntu/18/Dockerfile

diff --git a/ubuntu/18/Dockerfile b/ubuntu/18/Dockerfile
index ba7e55b..2074094 100644
--- a/ubuntu/18/Dockerfile
+++ b/ubuntu/18/Dockerfile
@@ -14,7 +14,7 @@
 # Install OpenJDK and Gerrit in two subsequent transactions
 # (pre-trans Gerrit script needs to have access to the Java command)
 RUN apt-get -y install openjdk-8-jdk
-RUN apt-get -y install gerrit=3.0.0.rc0-1 && \
+RUN apt-get -y install gerrit=3.0.0.rc1-1 && \
     rm -f /var/gerrit/etc/ssh* && \
     rm -f /var/gerrit/etc/secure* && \
     rm -Rf /var/gerrit/git/* && \