Build fails due to dependencies not found

[mindcrime]

Looks like the River 3.0 artifacts are not in Maven Central. Might be good to update the docs for this project to reflect that. Not sure what it would take to get the River artifacts into Central.

`FAILURE: Build failed with an exception.

• Where:
  Build file '/home/prhodes/development/experimental/river-jini/apache-river-example/hello-service/build.gradle' line: 35

• What went wrong:
  A problem occurred evaluating project ':hello-service'.

Could not resolve all dependencies for configuration ':hello-service:river_platform'.
Could not find org.apache.river:start:3.0.0.
Searched in the following locations:
file:/home/prhodes/.m2/repository/org/apache/river/start/3.0.0/start-3.0.0.pom
file:/home/prhodes/.m2/repository/org/apache/river/start/3.0.0/start-3.0.0.jar
https://repo1.maven.org/maven2/org/apache/river/start/3.0.0/start-3.0.0.pom
https://repo1.maven.org/maven2/org/apache/river/start/3.0.0/start-3.0.0.jar
Required by:
org.apache.river.examples:hello-service:1.0
Could not find net.jini:jsk-platform:3.0.0.
Searched in the following locations:
file:/home/prhodes/.m2/repository/net/jini/jsk-platform/3.0.0/jsk-platform-3.0.0.pom
file:/home/prhodes/.m2/repository/net/jini/jsk-platform/3.0.0/jsk-platform-3.0.0.jar
https://repo1.maven.org/maven2/net/jini/jsk-platform/3.0.0/jsk-platform-3.0.0.pom
https://repo1.maven.org/maven2/net/jini/jsk-platform/3.0.0/jsk-platform-3.0.0.jar
Required by:
org.apache.river.examples:hello-service:1.0
Could not find net.jini:groovy-config:3.0.0.
Searched in the following locations:
file:/home/prhodes/.m2/repository/net/jini/groovy-config/3.0.0/groovy-config-3.0.0.pom
file:/home/prhodes/.m2/repository/net/jini/groovy-config/3.0.0/groovy-config-3.0.0.jar
https://repo1.maven.org/maven2/net/jini/groovy-config/3.0.0/groovy-config-3.0.0.pom
https://repo1.maven.org/maven2/net/jini/groovy-config/3.0.0/groovy-config-3.0.0.jar
Required by:
org.apache.river.examples:hello-service:1.0

• Try:
  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED`