Control replication `mirror` option from Docker Compose

Adds suport for `MIRROR` environment varialbe to control replication
`remote.mirror` behaviour. This simplify testing of replication
mirroring.

Change-Id: I0b82d7166a2e0936999ff58a83003a27d392983b

example-setup/broker/configs/replication.config.template

diff --git a/example-setup/broker/configs/replication.config.template b/example-setup/broker/configs/replication.config.template
index e77edeb..92047f8 100644
--- a/example-setup/broker/configs/replication.config.template
+++ b/example-setup/broker/configs/replication.config.template
@@ -14,7 +14,7 @@
     url = http://$REMOTE_URL:8080/#{name}#.git
     apiUrl = http://$REMOTE_URL:8080/
     fetch = +refs/*:refs/*
-    mirror = true
+    mirror = $MIRROR
     timeout = 60 # In seconds
     connectionTimeout = 120000 # In mseconds
     rescheduleDelay = 15

example-setup/broker/docker-compose.yaml

diff --git a/example-setup/broker/docker-compose.yaml b/example-setup/broker/docker-compose.yaml
index 705aea6..5d2e68a 100644
--- a/example-setup/broker/docker-compose.yaml
+++ b/example-setup/broker/docker-compose.yaml
@@ -11,6 +11,7 @@
       - BROKER_HOST=broker
       - BROKER_PORT=9092
       - REPLICATE_ON_STARTUP=false
+      - MIRROR=true
     ports:
       - "8080:8080"
       - "29418:29418"
@@ -28,6 +29,7 @@
       - BROKER_HOST=broker
       - BROKER_PORT=9092
       - REPLICATE_ON_STARTUP=true
+      - MIRROR=true
     ports:
       - "8081:8080"
       - "29419:29418"

example-setup/http/configs/replication.config.template

diff --git a/example-setup/http/configs/replication.config.template b/example-setup/http/configs/replication.config.template
index 6768146..53809ca 100644
--- a/example-setup/http/configs/replication.config.template
+++ b/example-setup/http/configs/replication.config.template
@@ -13,7 +13,7 @@
     url = http://$REMOTE_URL:8080/#{name}#.git
     apiUrl = http://$REMOTE_URL:8080
     fetch = +refs/*:refs/*
-    mirror = true
+    mirror = $MIRROR
     timeout = 60 # In seconds
     connectionTimeout = 120000 # In mseconds
     rescheduleDelay = 15

example-setup/http/docker-compose.yaml

diff --git a/example-setup/http/docker-compose.yaml b/example-setup/http/docker-compose.yaml
index ccb6b86..62fed3c 100644
--- a/example-setup/http/docker-compose.yaml
+++ b/example-setup/http/docker-compose.yaml
@@ -9,6 +9,7 @@
       - REMOTE_URL=gerrit2
       - DEBUG_PORT=5005
       - REPLICATE_ON_STARTUP=false
+      - MIRROR=true
     ports:
       - "8080:8080"
       - "29418:29418"
@@ -22,6 +23,7 @@
       - REMOTE_URL=gerrit1
       - DEBUG_PORT=5006
       - REPLICATE_ON_STARTUP=true
+      - MIRROR=true
     ports:
       - "8081:8080"
       - "29419:29418"