Add script for sample generation and adapt gradle and pom templates

modules/swagger-codegen/src/main/resources/Java/libraries/retrofit2/build.gradle.mustache

@@ -20,7 +20,7 @@ if(hasProperty('target') && target == 'android') {
 
 	apply plugin: 'com.android.library'
 	apply plugin: 'com.github.dcendents.android-maven'
-	
+
 	android {
 	    compileSdkVersion 22
 	    buildToolsVersion '22.0.0'
@@ -32,7 +32,7 @@ if(hasProperty('target') && target == 'android') {
 	        sourceCompatibility JavaVersion.VERSION_1_7
 	        targetCompatibility JavaVersion.VERSION_1_7
 	    }
-	
+
 	    // Rename the aar correctly
 	    libraryVariants.all { variant ->
 	        variant.outputs.each { output ->
@@ -44,7 +44,7 @@ if(hasProperty('target') && target == 'android') {
 	        }
 	    }
 	}
-	
+
 	afterEvaluate {
 	    android.libraryVariants.all { variant ->
 	        def task = project.tasks.create "jar${variant.name.capitalize()}", Jar
@@ -56,12 +56,12 @@ if(hasProperty('target') && target == 'android') {
 	        artifacts.add('archives', task);
 	    }
 	}
-	
+
 	task sourcesJar(type: Jar) {
 	    from android.sourceSets.main.java.srcDirs
 	    classifier = 'sources'
 	}
-	
+
 	artifacts {
 	    archives sourcesJar
 	}
@@ -70,16 +70,16 @@ if(hasProperty('target') && target == 'android') {
 
 	apply plugin: 'java'
 	apply plugin: 'maven'
-	
-	sourceCompatibility = JavaVersion.VERSION_1_7
-	targetCompatibility = JavaVersion.VERSION_1_7
-	
+
+	sourceCompatibility = JavaVersion.VERSION_1_8
+	targetCompatibility = JavaVersion.VERSION_1_8
+
 	install {
 	    repositories.mavenInstaller {
 	        pom.artifactId = '{{artifactId}}'
 	    }
 	}
-	
+
 	task execute(type:JavaExec) {
 	   main = System.getProperty('mainClass')
 	   classpath = sourceSets.main.runtimeClasspath

modules/swagger-codegen/src/main/resources/Java/libraries/retrofit2/pom.mustache

@@ -100,8 +100,8 @@
         <artifactId>maven-compiler-plugin</artifactId>
         <version>2.3.2</version>
         <configuration>
-          <source>1.6</source>
-          <target>1.6</target>
+          <source>1.8</source>
+          <target>1.8</target>
         </configuration>
       </plugin>
     </plugins>
@@ -137,6 +137,18 @@
       <artifactId>okhttp</artifactId>
       <version>${okhttp-version}</version>
     </dependency>
+      {{#useRxJava}}
+          <dependency>
+              <groupId>io.reactivex</groupId>
+              <artifactId>rxjava</artifactId>
+              <version>${rxjava-version}</version>
+          </dependency>
+          <dependency>
+              <groupId>com.squareup.retrofit</groupId>
+              <artifactId>adapter-rxjava</artifactId>
+              <version>${retrofit-version}</version>
+          </dependency>
+      {{/useRxJava}}
 
     <!-- test dependencies -->
     <dependency>
@@ -149,6 +161,7 @@
   <properties>
     <swagger-annotations-version>1.5.0</swagger-annotations-version>
     <retrofit-version>2.0.0-beta2</retrofit-version>
+    {{#useRxJava}}<rxjava-version>1.0.15</rxjava-version>{{/useRxJava}}
     <okhttp-version>2.5.0</okhttp-version>
     <gson-version>2.4</gson-version>
     <oltu-version>1.0.0</oltu-version>