Use kuromoji from maven repository.

[zaimy]

Hello!

The following error occurs when running version 0.4.0. It seems that the kuromoji classes are not properly referenced using the pre-built jar file bundled with the repository.

Exception in thread "main" java.lang.NoClassDefFoundError: Lorg/atilika/kuromoji/Tokenizer;
        at java.lang.Class.getDeclaredFields0(Native Method)
        at java.lang.Class.privateGetDeclaredFields(Class.java:2583)
        at java.lang.Class.getDeclaredFields(Class.java:1916)
        at org.apache.beam.sdk.util.common.ReflectHelpers.declaredMembersWithAnnotation(ReflectHelpers.java:313)
        at org.apache.beam.sdk.util.common.ReflectHelpers.declaredFieldsWithAnnotation(ReflectHelpers.java:289)
        at org.apache.beam.sdk.transforms.reflect.DoFnSignatures.analyzeStateDeclarations(DoFnSignatures.java:2274)
        at org.apache.beam.sdk.transforms.reflect.DoFnSignatures.parseSignature(DoFnSignatures.java:532)
        at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660)
        at org.apache.beam.sdk.transforms.reflect.DoFnSignatures.getSignature(DoFnSignatures.java:300)
        at org.apache.beam.sdk.transforms.ParDo.validate(ParDo.java:614)
        at org.apache.beam.sdk.transforms.ParDo.of(ParDo.java:403)
        at com.github.yuiskw.beam.Kuromoji4BigQuery.main(Kuromoji4BigQuery.java:133)
Caused by: java.lang.ClassNotFoundException: org.atilika.kuromoji.Tokenizer
        at java.net.URLClassLoader.findClass(URLClassLoader.java:387)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
        ... 12 more

As of #51, kuromoji 0.7.7 was not available in the maven repository. However, I have discovered that it is now available again. And I have confirmed that morphological analysis can be performed on Dataflow using version 0.4.1, which reflects the changes in this pull request. :)

[yu-iskw]

LGTM. Thank you for fixing this.

[zaimy]

Thank you for your review!