Don't generate pom.xml

because it's not possible to build with it (see
    criteo/criteo-api-java-sdk#13 ).
Not sure why, but it makes more sense to maintain gradle build script only.

generator/java/build.gradle

@@ -124,7 +124,7 @@ task generateClient(type: GradleBuild) {
 
             delete fileTree(clientOutputDirPerVersion) {
                 include '.openapi-generator-ignore', '.travis.yml', 'git_push.sh',\
-                        'build.sbt', 'src/main/AndroidManifest.xml', 'gradle.properties'
+                        'build.sbt', 'src/main/AndroidManifest.xml', 'gradle.properties', 'pom.xml'
             }
             followSymlinks = true
         }

generator/java/resources/templates/README.mustache

@@ -25,23 +25,17 @@ More information: [https://developers.criteo.com/](https://developers.criteo.com
 Building the API client library requires:
 
 1. Java 1.8+
-2. Maven/Gradle
+2. Gradle
 
-## Installation
+## How to build
 
-To install the API client library to your local Maven repository, simply execute:
+To build the jar, simply execute:
 
 ```shell
-mvn clean install
+./gradlew jar
 ```
 
-To deploy it to a remote Maven repository instead, configure the settings of the repository and execute:
-
-```shell
-mvn clean deploy
-```
-
-Refer to the [OSSRH Guide](http://central.sonatype.org/pages/ossrh-guide.html) for more information.
+The built jar will be available in build/libs.
 
 ### Maven users
 
@@ -69,13 +63,12 @@ compile "{{{groupId}}}:{{{artifactId}}}:{{{artifactVersion}}}"
 At first generate the JAR by executing:
 
 ```shell
-mvn clean package
+./gradlew jar
 ```
 
 Then manually install the following JARs:
 
-* `target/{{{artifactId}}}-{{{artifactVersion}}}.jar`
-* `target/lib/*.jar`
+* `build/libs/{{{artifactId}}}-{{{artifactVersion}}}.jar`
 
 ## Example
 
@@ -101,4 +94,4 @@ It's recommended to create an instance of `ApiClient` per thread in a multithrea
 
 ## Disclaimer
 
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

generator/java/resources/templates/build.gradle.mustache

@@ -37,7 +37,6 @@ sourceSets {
 sourceCompatibility = JavaVersion.VERSION_1_8
 targetCompatibility = JavaVersion.VERSION_1_8
 
-// Note: these dependencies should be kept in sync with the ones of the generated pom.xml
 dependencies {
     implementation 'io.swagger:swagger-annotations:1.6.8'
     implementation 'javax.annotation:javax.annotation-api:1.3.2'
@@ -132,4 +131,4 @@ nexusPublishing {
         maxRetries.set(50)
         delayBetween.set(java.time.Duration.ofMillis(3000))
     }
-}
+}

scripts/languages/java/java_sdk_test_action.py

@@ -7,25 +7,6 @@ def __init__(self):
 
   def execute(self, sdk_name):
     self.logger.info(f'Starting testing SDK {sdk_name}...')
-
-    self.logger.info('Testing with the Maven setup !')
-    self.logger.info('Installing dependencies...')
-    run_command('mvn install', error_template=self.java_error_template)
-    self.logger.info('Install successful')
-
-    self.logger.info('Testing...')
-    run_command('mvn test', error_template=self.java_error_template, env={
-      'TEST_CLIENT_ID': assert_environment_variable('TEST_CLIENT_ID'),
-      'TEST_CLIENT_SECRET': assert_environment_variable('TEST_CLIENT_SECRET'),
-      'TEST_APPLICATION_ID': assert_environment_variable('TEST_APPLICATION_ID'),
-    })
-    self.logger.info('Test successful')
-
-    self.logger.info('Cleaning package...')
-    run_command('mvn clean')
-    self.logger.info('Clean successful')
-
-    self.logger.info('Testing with the Gradle setup !')
     run_command('chmod u+x ./gradlew')
     run_command('./gradlew check', error_template=self.java_error_template, env={
       'TEST_CLIENT_ID': assert_environment_variable('TEST_CLIENT_ID'),