Fix failed Java test and run Java unit test while compiling. (#306)

* Run Java tests in unit test CIs.

Author: mashhurs

.ci/logstash-run.sh

@@ -27,6 +27,7 @@ bundle exec rake prepare_geoip_resources
 
 if [[ "$INTEGRATION" != "true" ]]; then
   bundle exec rspec --format=documentation spec/unit --tag ~integration --tag ~secure_integration
+  bundle exec rake java_test
 else
 
   if [[ "$SECURE_INTEGRATION" == "true" ]]; then

Rakefile

@@ -1,19 +1,13 @@
 require 'logstash/devutils/rake'
 
-task :install_jars do
+task :vendor do
   sh('./gradlew clean vendor')
 end
+
 task :prepare_geoip_resources do
   sh('./gradlew geoipTestResources')
 end
 
-task :vendor => :install_jars
-
-task :test do
-  require 'rspec'
-  require 'rspec/core/runner'
-  Rake::Task[:install_jars].invoke
-  Rake::Task[:generate_ssl].invoke
-  sh './gradlew test'
-  exit(RSpec::Core::Runner.run(Rake::FileList['spec/**/*_spec.rb']))
+task :java_test do
+  sh('./gradlew test')
 end