modified KAFKA_CREATE_TOPICS syntax

Replaced `name1,partitions,replicas:name2,partitions,replicas` with
`name1:partitions:replicas,name2:partitions:replicas`.

Author: filiptepper

README.md

@@ -45,12 +45,10 @@ added in ```docker-compose.yml```.
 Here is an example snippet from ```docker-compose.yml```:
 
         environment:
-          KAFKA_CREATE_TOPICS: "Topic1,1,3:Topic2,1,1"
+          KAFKA_CREATE_TOPICS: "Topic1:1:3,Topic2:1:1"
 
 ```Topic 1``` will have 1 partition and 3 replicas, ```Topic 2``` will have 1 partition and 1 replica.
 
-NOTE: All topics will be created with a single partition and a single replica
-
 ##Tutorial
 
 [http://wurstmeister.github.io/kafka-docker/](http://wurstmeister.github.io/kafka-docker/)

start-kafka.sh

@@ -38,8 +38,8 @@ KAFKA_SERVER_PID=$!
 while netstat -lnt | awk '$4 ~ /:9092$/ {exit 1}'; do sleep 1; done
 
 if [[ -n $KAFKA_CREATE_TOPICS ]]; then
-    IFS=':'; for topicToCreate in $KAFKA_CREATE_TOPICS; do
-        IFS=',' read -a topicConfig <<< "$topicToCreate"
+    IFS=','; for topicToCreate in $KAFKA_CREATE_TOPICS; do
+        IFS=':' read -a topicConfig <<< "$topicToCreate"
         $KAFKA_HOME/bin/kafka-topics.sh --create --zookeeper $KAFKA_ZOOKEEPER_CONNECT --replication-factor ${topicConfig[2]} --partition ${topicConfig[1]} --topic "${topicConfig[0]}"
     done
 fi