use trusty distribution (#145)

Upgrade travis-ci travis.yml to use trusty distribution since that is their new standard.
The gradle version of their linux distribution is gradle 4.0.1 so I upgraded our gradle wrapper to that.
That required we upgrade our nebula dependency to 3.2.0.
Drop support for JDK 7 until travis-ci can fix that.

Author: wangjoshuah

.travis.yml

@@ -1,13 +1,13 @@
 language: java
-dist: precise
+dist: trusty
 jdk:
-  - openjdk7
-  - oraclejdk7
+  - openjdk8
   - oraclejdk8
+  - oraclejdk9
 install: true
 script:
-    - "./gradlew clean"
-    - "./gradlew exhaustiveTest"
+    - "gradle clean"
+    - "gradle exhaustiveTest"
     - "if [[ -n $TRAVIS_TAG ]]; then
           ./gradlew ship;
       else

build.gradle

@@ -12,7 +12,7 @@ buildscript {
 }
 
 plugins {
-    id 'nebula.optional-base' version '3.0.3'
+    id 'nebula.optional-base' version '3.2.0'
     id 'me.champeau.gradle.jmh' version '0.3.1'
 }
 
@@ -37,7 +37,6 @@ subprojects {
     apply plugin: 'jacoco'
     apply plugin: 'maven-publish'
     apply plugin: 'me.champeau.gradle.jmh'
-    apply plugin: 'nebula.provided-base'
     apply plugin: 'nebula.optional-base'
 
     sourceCompatibility = 1.6
@@ -108,6 +107,11 @@ subprojects {
         // logging dependencies (logback)
         testCompile group: 'ch.qos.logback', name: 'logback-classic', version: logbackVersion
         testCompile group: 'ch.qos.logback', name: 'logback-core', version: logbackVersion
+
+        testCompile group: 'com.google.code.gson', name: 'gson', version: gsonVersion
+        testCompile group: 'org.json', name: 'json', version: jsonVersion
+        testCompile group: 'com.googlecode.json-simple', name: 'json-simple', version: jsonSimpleVersion
+        testCompile group: 'com.fasterxml.jackson.core', name: 'jackson-databind', version: jacksonVersion
     }
 
     publishing {
@@ -172,7 +176,3 @@ task ship() {
     dependsOn(':core-api:ship', ':core-httpclient-impl:ship')
 }
 
-// todo: remove this wrapper version once we're publishing to jcenter/maven central
-task wrapper(type: Wrapper) {
-    distributionUrl = gradleWrapperUrl
-}

core-api/build.gradle

@@ -2,14 +2,14 @@ dependencies {
     compile group: 'org.slf4j', name: 'slf4j-api', version: slf4jVersion
     compile group: 'com.fasterxml.jackson.core', name: 'jackson-annotations', version: jacksonVersion
 
-    provided group: 'com.google.code.findbugs', name: 'annotations', version: findbugsVersion
-    provided group: 'com.google.code.findbugs', name: 'jsr305', version: findbugsVersion
+    compile group: 'com.google.code.findbugs', name: 'annotations', version: findbugsVersion
+    compile group: 'com.google.code.findbugs', name: 'jsr305', version: findbugsVersion
 
     // an assortment of json parsers
-    provided group: 'com.google.code.gson', name: 'gson', version: gsonVersion, optional
-    provided group: 'org.json', name: 'json', version: jsonVersion, optional
-    provided group: 'com.googlecode.json-simple', name: 'json-simple', version: jsonSimpleVersion, optional
-    provided group: 'com.fasterxml.jackson.core', name: 'jackson-databind', version: jacksonVersion, optional
+    compileOnly group: 'com.google.code.gson', name: 'gson', version: gsonVersion, optional
+    compileOnly group: 'org.json', name: 'json', version: jsonVersion, optional
+    compileOnly group: 'com.googlecode.json-simple', name: 'json-simple', version: jsonSimpleVersion, optional
+    compileOnly group: 'com.fasterxml.jackson.core', name: 'jackson-databind', version: jacksonVersion, optional
 }
 
 task generateVersionFile {

core-httpclient-impl/build.gradle

@@ -1,9 +1,7 @@
 dependencies {
     compile project(':core-api')
 
-    provided group: 'com.google.code.findbugs', name: 'annotations', version: findbugsVersion
-    provided group: 'com.google.code.findbugs', name: 'jsr305', version: findbugsVersion
-    provided group: 'com.google.code.gson', name: 'gson', version: gsonVersion
+    compileOnly group: 'com.google.code.gson', name: 'gson', version: gsonVersion
 
     compile group: 'org.apache.httpcomponents', name: 'httpclient', version: httpClientVersion
 }

gradle.properties

@@ -5,7 +5,6 @@ version = 2.0.0-SNAPSHOT
 mavenS3Bucket = optimizely-maven
 
 # Gradle Settings
-gradleWrapperUrl = https://github.com/optimizely/gradle/releases/download/REL_2.4-20150402032942%2B0000/gradle-2.4-20150402032942.0000-bin.zip
 org.gradle.configureondemand = true
 org.gradle.daemon = true
 org.gradle.parallel = true

gradle/wrapper/gradle-wrapper.jar

@@ -1,6 +1,6 @@
-#Tue Feb 23 16:11:46 PST 2016
+#Mon Sep 25 16:03:41 PDT 2017
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.10-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.0.1-all.zip