Switch off development gradle plugins.

--- a/build.gradle
+++ b/build.gradle
@@ -1,35 +1,41 @@
 import org.apache.tools.ant.filters.ReplaceTokens
 
+/*
 plugins {
     // github
     id "co.riiid.gradle" version "0.4.2"
     // bintray
     id "com.jfrog.bintray" version "1.6"
 }
+*/
 
 // common settings
 subprojects {
   apply plugin: 'java'
+  /*
   apply plugin: 'jacoco'
   apply plugin: 'checkstyle'
   apply plugin: 'findbugs'
   apply plugin: 'co.riiid.gradle'
   apply plugin: 'com.jfrog.bintray'
+  */
   apply plugin: 'maven'
 
   sourceCompatibility = jdkVersion
   targetCompatibility = jdkVersion
   [compileJava, compileTestJava]*.options*.encoding = 'UTF-8'
-  [compileJava, compileTestJava]*.options*.bootClasspath = "$JDK_HOME/jre/lib/rt.jar"
+  //[compileJava, compileTestJava]*.options*.bootstrapClasspath = "$JDK_HOME/jre/lib/rt.jar"
+  /*
   checkstyle {
     config = resources.text.fromFile("${rootProject.projectDir}/config/checkstyle/checkstyle.xml")
     ignoreFailures = true
     toolVersion = '6.16.1'
   }
+  */
 
   // Force prevent checkstyle/findbugs on Test.
-  task checkstyleTest(overwrite: true) << {}
-  task findbugsTest(overwrite: true) << {}
+  //task checkstyleTest(overwrite: true) << {}
+  //task findbugsTest(overwrite: true) << {}
   tasks.withType(FindBugs) {
     reports {
       xml.enabled = false
@@ -43,11 +49,11 @@
   }
 
   dependencies {
-    testCompile 'org.testng:testng:6.9.10'
+    //testCompile 'org.testng:testng:6.9.10'
   }
 
   test {
-    useTestNG()
+    //useTestNG()
   }
 
   javadoc {
@@ -73,10 +79,11 @@
 
 project(':dictzip-lib') {
   dependencies {
-    testCompile 'tokyo.northside:northside-io:0.2.0'
+    //testCompile 'tokyo.northside:northside-io:0.2.0'
   }
   version = projectVersion
   group = projectGroup
+  /*
   bintray {
       user = project.hasProperty('bintrayUser') ? project.property('bintrayUser') : System.getenv('BINTRAY_USER')
       key = project.hasProperty('bintrayApiKey') ? project.property('bintrayApiKey') : System.getenv('BINTRAY_API_KEY')
@@ -91,8 +98,9 @@
           publicDownloadNumbers = true
       }
   }
-  task mandoc << {}
-  task githubRelease(overwrite: true) << {}
+  */
+  //task mandoc << {}
+  //task githubRelease(overwrite: true) << {}
 }
 
 project(':dictzip-cli') {
@@ -107,6 +115,7 @@
   }
   version = projectVersion
   group = projectGroup
+  /*
   bintray {
       user = project.hasProperty('bintrayUser') ? project.property('bintrayUser') : System.getenv('BINTRAY_USER')
       key = project.hasProperty('bintrayApiKey') ? project.property('bintrayApiKey') : System.getenv('BINTRAY_API_KEY')
@@ -121,6 +130,7 @@
           publicDownloadNumbers = true
       }
   }
+  */
 
   task mandoc(type: Copy, overwrite: true) {
     from "doc/dictzip.1.in"
@@ -152,11 +162,11 @@
           }
       }
   }
-  task githubRelease(overwrite: true) << {}
+  //task githubRelease(overwrite: true) << {}
 }
 
-task mandoc << {}
-task bintrayUpload(overwrite: true) << {}
+//task mandoc << {}
+//task bintrayUpload(overwrite: true) << {}
 
 if (gradle.startParameter.taskNames.contains('bintrayUpload')  ||
     gradle.startParameter.taskNames.contains('githubRelease')) {
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,5 +1,5 @@
 jdkVersion=1.8
-JDK_HOME=/usr/lib/jvm/java-8-openjdk-amd64
+JDK_HOME=/usr/lib/jvm/default-java
 projectUrl=https://github.com/miurahr/dictzip-java
 githubUrl=git@github.com:miurahr/dictzip-java.git
 projectGroup=org.dict.zip