remove log4j-to-slf4j (log4j-slf4j-impl is used)

Author: deki

samples/struts2/pet-store/build.gradle

@@ -5,14 +5,20 @@ repositories {
   mavenCentral()
 }
 
+configurations {
+  implementation {
+    exclude group: 'org.apache.logging.log4j', module: 'log4j-to-slf4j'
+  }
+}
+
 dependencies {
   implementation (
           'com.amazonaws.serverless:aws-serverless-java-container-struts2:[1.0,)',
           'org.apache.struts:struts2-convention-plugin:2.5.26',
           'org.apache.struts:struts2-rest-plugin:2.5.26',
           'org.apache.struts:struts2-bean-validation-plugin:2.5.26',
           'org.apache.struts:struts2-junit-plugin:2.5.26',
-          'com.jgeppert.struts2:struts2-aws-lambda-support-plugin:1.2.0',
+          'com.jgeppert.struts2:struts2-aws-lambda-support-plugin:1.3.0',
           'org.hibernate:hibernate-validator:5.4.3.Final',
           'com.fasterxml.jackson.core:jackson-databind:2.12.4',
           'org.apache.logging.log4j:log4j-core:2.14.1',