NoSuchMethod Error in gax core #3470

<dependencies>
	<!-- Compile/runtime dependencies -->
	<dependency>
		<groupId>com.google.appengine</groupId>
		<artifactId>appengine-api-1.0-sdk</artifactId>
		<version>1.9.49</version>
	</dependency>
	<dependency>
		<groupId>com.google.apis</groupId>
		<artifactId>google-api-services-pagespeedonline</artifactId>
		<version>v2-rev13-1.22.0</version>
	</dependency>

	<dependency>
		<groupId>javax.servlet</groupId>
		<artifactId>servlet-api</artifactId>
		<version>3.0-alpha-1</version>
		<scope>provided</scope>
	</dependency>
	<dependency>
		<groupId>jstl</groupId>
		<artifactId>jstl</artifactId>
		<version>1.2</version>
	</dependency>

	<dependency>
		<groupId>com.googlecode.objectify</groupId>
		<artifactId>objectify</artifactId>
		<version>5.1.14</version>
	</dependency>


	<!-- Cloud SQL Library dependency-->
	<dependency>
		<groupId>com.google.apis</groupId>
		<artifactId>google-api-services-sqladmin</artifactId>
		<version>v1beta4-rev50-1.23.0</version>
	</dependency>

	<!-- Cloud SQL JDBC Library dependency-->
	<dependency> <!-- Only used locally -->
		<groupId>mysql</groupId>
		<artifactId>mysql-connector-java</artifactId>
		<version>5.1.42</version>  <!-- v5.x.x is for production, v6.x.x EAP X DevAPI -->
	</dependency>
	<dependency>
		<groupId>com.google.cloud.sql</groupId>
		<!-- If using MySQL 6.x driver, use mysql-socket-factory-connector-j-6 instead -->
		<artifactId>mysql-socket-factory</artifactId>
		<version>1.0.5</version>
	</dependency>

	<!-- Restlet dependencies -->
	<dependency>
		<groupId>org.restlet.jee</groupId>
		<artifactId>org.restlet</artifactId>
		<version>${restlet.target.version}</version>
	</dependency>
	<dependency>
		<groupId>org.restlet.jee</groupId>
		<artifactId>org.restlet.ext.json</artifactId>
		<version>${restlet.target.version}</version>
	</dependency>
	<dependency>
		<groupId>org.restlet.jee</groupId>
		<artifactId>org.restlet.ext.servlet</artifactId>
		<version>${restlet.target.version}</version>
	</dependency>
	<dependency>
		<groupId>org.restlet.jee</groupId>
		<artifactId>org.restlet.ext.fileupload</artifactId>
		<version>${restlet.target.version}</version>
	</dependency>
	<dependency>
		<groupId>org.restlet.jee</groupId>
		<artifactId>org.restlet.ext.xml</artifactId>
		<version>${restlet.target.version}</version>
	</dependency>
	<dependency>
		<groupId>org.restlet.osgi</groupId>
		<artifactId>org.restlet.ext.swagger</artifactId>
		<version>${restlet.target.version}</version>
		<exclusions>
			<!-- exclude transitive dependency (version 0.8.7) -->
			<!-- because is not available in Central and 0.8.11 is -->
			<exclusion>
				<groupId>org.raml</groupId>
				<artifactId>raml-parser</artifactId>
			</exclusion>
		</exclusions>
	</dependency>
	<!-- explicitly define dependency to version 0.8.11 -->
	<dependency>
		<groupId>org.raml</groupId>
		<artifactId>raml-parser</artifactId>
		<version>0.8.11</version>
	</dependency>

	<dependency>
		<groupId>joda-time</groupId>
		<artifactId>joda-time</artifactId>
		<version>2.9.7</version>
	</dependency>
	<dependency>
		<groupId>com.google.code.gson</groupId>
		<artifactId>gson</artifactId>
		<version>2.8.0</version>
	</dependency>
	<dependency>
		<groupId>com.google.guava</groupId>
		<artifactId>guava</artifactId>
		<version>18.0</version>
	</dependency>

	<!-- Test Dependencies -->
	<dependency>
		<groupId>junit</groupId>
		<artifactId>junit</artifactId>
		<version>4.12</version>
		<scope>test</scope>
	</dependency>
	<dependency>
		<groupId>org.mockito</groupId>
		<artifactId>mockito-all</artifactId>
		<version>2.0.2-beta</version>
		<scope>test</scope>
	</dependency>
	<dependency>
		<groupId>com.google.appengine</groupId>
		<artifactId>appengine-testing</artifactId>
		<version>${appengine.target.version}</version>
		<scope>test</scope>
	</dependency>
	<dependency>
		<groupId>com.google.appengine</groupId>
		<artifactId>appengine-api-stubs</artifactId>
		<version>${appengine.target.version}</version>
		<scope>test</scope>
	</dependency>
	<dependency>
		<groupId>com.google.cloud</groupId>
		<artifactId>google-cloud-storage</artifactId>
		<version>1.4.0</version>
	</dependency>
	<dependency>
		<groupId>com.google.endpoints</groupId>
		<artifactId>endpoints-framework-tools</artifactId>
		<version>2.0.3</version>
	</dependency>
	<dependency>
		<groupId>com.google.endpoints</groupId>
		<artifactId>endpoints-management-control-appengine</artifactId>
		<version>1.0.2</version>
	</dependency>
	<dependency>
		<groupId>com.google.endpoints</groupId>
		<artifactId>endpoints-framework-auth</artifactId>
		<version>1.0.2</version>
	</dependency>
</dependencies>`