Add group to generated gradle projects

Closes gh-478

initializr-generator/src/main/resources/templates/starter-build.gradle

@@ -44,6 +44,7 @@ apply plugin: 'io.spring.dependency-management'
 apply plugin: 'war'
 {{/war}}
 
+group = '{{groupId}}'
 version = '{{version}}'
 sourceCompatibility = {{javaVersion}}{{#kotlin}}{{#isJava8}}
 compileKotlin {

initializr-generator/src/test/java/io/spring/initializr/generator/ProjectGeneratorBuildTests.java

@@ -83,7 +83,7 @@ public class ProjectGeneratorBuildTests extends AbstractProjectGeneratorTests {
 
 	@Test
 	public void standardWarGroovy() {
-		testStandardWar("java");
+		testStandardWar("groovy");
 	}
 
 	@Test

initializr-generator/src/test/resources/project/gradle/bom-ordering-build.gradle.gen

@@ -16,6 +16,7 @@ apply plugin: 'eclipse'
 apply plugin: 'spring-boot'
 apply plugin: 'io.spring.dependency-management'
 
+group = 'com.example'
 version = '0.0.1-SNAPSHOT'
 sourceCompatibility = 1.8
 

initializr-generator/src/test/resources/project/gradle/bom-property-build.gradle.gen

@@ -16,6 +16,7 @@ apply plugin: 'eclipse'
 apply plugin: 'spring-boot'
 apply plugin: 'io.spring.dependency-management'
 
+group = 'com.example'
 version = '0.0.1-SNAPSHOT'
 sourceCompatibility = 1.8
 

initializr-generator/src/test/resources/project/gradle/compile-only-dependency-build.gradle.gen

@@ -16,6 +16,7 @@ apply plugin: 'eclipse'
 apply plugin: 'spring-boot'
 apply plugin: 'io.spring.dependency-management'
 
+group = 'com.example'
 version = '0.0.1-SNAPSHOT'
 sourceCompatibility = 1.8
 

initializr-generator/src/test/resources/project/gradle/kotlin-java6-build.gradle.gen

@@ -20,6 +20,7 @@ apply plugin: 'eclipse'
 apply plugin: 'spring-boot'
 apply plugin: 'io.spring.dependency-management'
 
+group = 'com.example'
 version = '0.0.1-SNAPSHOT'
 sourceCompatibility = 1.6
 

initializr-generator/src/test/resources/project/gradle/kotlin-java7-build.gradle.gen

@@ -20,6 +20,7 @@ apply plugin: 'eclipse'
 apply plugin: 'spring-boot'
 apply plugin: 'io.spring.dependency-management'
 
+group = 'com.example'
 version = '0.0.1-SNAPSHOT'
 sourceCompatibility = 1.7
 

initializr-generator/src/test/resources/project/gradle/version-override-build.gradle.gen

@@ -16,6 +16,7 @@ apply plugin: 'eclipse'
 apply plugin: 'spring-boot'
 apply plugin: 'io.spring.dependency-management'
 
+group = 'com.example'
 version = '0.0.1-SNAPSHOT'
 sourceCompatibility = 1.8
 

initializr-generator/src/test/resources/project/groovy/standard/build.gradle.gen

@@ -16,6 +16,7 @@ apply plugin: 'eclipse'
 apply plugin: 'spring-boot'
 apply plugin: 'io.spring.dependency-management'
 
+group = 'com.example'
 version = '0.0.1-SNAPSHOT'
 sourceCompatibility = 1.8
 

initializr-generator/src/test/resources/project/groovy/war/build.gradle.gen

@@ -17,6 +17,7 @@ apply plugin: 'spring-boot'
 apply plugin: 'io.spring.dependency-management'
 apply plugin: 'war'
 
+group = 'com.example'
 version = '0.0.1-SNAPSHOT'
 sourceCompatibility = 1.8
 

initializr-generator/src/test/resources/project/java/standard/build.gradle.gen

@@ -16,6 +16,7 @@ apply plugin: 'eclipse'
 apply plugin: 'spring-boot'
 apply plugin: 'io.spring.dependency-management'
 
+group = 'com.example'
 version = '0.0.1-SNAPSHOT'
 sourceCompatibility = 1.8
 

initializr-generator/src/test/resources/project/java/war/build.gradle.gen

@@ -17,6 +17,7 @@ apply plugin: 'spring-boot'
 apply plugin: 'io.spring.dependency-management'
 apply plugin: 'war'
 
+group = 'com.example'
 version = '0.0.1-SNAPSHOT'
 sourceCompatibility = 1.8
 

initializr-generator/src/test/resources/project/kotlin/standard/build.gradle.gen

@@ -20,6 +20,7 @@ apply plugin: 'eclipse'
 apply plugin: 'spring-boot'
 apply plugin: 'io.spring.dependency-management'
 
+group = 'com.example'
 version = '0.0.1-SNAPSHOT'
 sourceCompatibility = 1.8
 compileKotlin {

initializr-generator/src/test/resources/project/kotlin/war/build.gradle.gen

@@ -21,6 +21,7 @@ apply plugin: 'spring-boot'
 apply plugin: 'io.spring.dependency-management'
 apply plugin: 'war'
 
+group = 'com.example'
 version = '0.0.1-SNAPSHOT'
 sourceCompatibility = 1.8
 compileKotlin {