Add module-info definitions, fix related issues

acme4j-it/pom.xml

@@ -102,17 +102,6 @@
 
     <build>
         <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-jar-plugin</artifactId>
-                <configuration>
-                    <archive>
-                        <manifestEntries>
-                            <Automatic-Module-Name>org.shredzone.acme4j.it</Automatic-Module-Name>
-                        </manifestEntries>
-                    </archive>
-                </configuration>
-            </plugin>
             <plugin>
                 <groupId>io.fabric8</groupId>
                 <artifactId>docker-maven-plugin</artifactId>

acme4j-it/src/main/java/module-info.java

@@ -0,0 +1,22 @@
+/*
+ * acme4j - Java ACME client
+ *
+ * Copyright (C) 2020 Richard "Shred" Körber
+ *   http://acme4j.shredzone.org
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+module org.shredzone.acme4j.it {
+    requires org.shredzone.acme4j;
+    requires org.shredzone.acme4j.utils;
+
+    requires com.github.spotbugs.annotations;
+    requires org.apache.httpcomponents.httpclient;
+    requires org.apache.httpcomponents.httpcore;
+}