Replace `./gradlew installAll` with `./gradlewAll install and remove invocation of `gradle`
See for more details with regards to
the former and with regards to the latter.
@@ -185,11 +185,8 @@ repository may have different Kafka requirements.
> $ cd kafka
> $ git checkout trunk
>
-> # Bootstrap gradle wrapper
-> $ gradle
->
> # Now build and install Kafka locally
-> $ ./gradlew clean installAll
+> $ ./gradlew clean && ./gradlewAll install
> ```
