Remove duplicate maven plugin and add better maven config for jar sign

Author: patrickfav

README.md

@@ -360,7 +360,7 @@ set as `pfopensource`.
 If you want to skip jar signing just change the skip configuration in the
 `pom.xml` jar sign plugin to true:
 
-    <skip>true</skip>
+    <project.skipJarSign>true</project.skipJarSign>
 
 ### Build with Maven
 

pom.xml

@@ -23,6 +23,8 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+        <project.skipJarSign>false
+        </project.skipJarSign> <!-- set this to true if fail because of missing credentials -->
     </properties>
 
     <repositories>
@@ -96,11 +98,6 @@
                     </dependency>
                 </dependencies>
             </plugin>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-surefire-plugin</artifactId>
-                <version>2.22.0</version>
-            </plugin>
             <plugin>
                 <groupId>org.jacoco</groupId>
                 <artifactId>jacoco-maven-plugin</artifactId>
@@ -132,7 +129,7 @@
                     </execution>
                 </executions>
                 <configuration>
-                    <skip>false</skip> <!-- set this to true if fail because of missing credentials -->
+                    <skip>${project.skipJarSign}</skip>
                     <keystore>${session.executionRootDirectory}/keystore.jks</keystore>
                     <alias>pfopensource</alias>
                     <storepass>${env.OPENSOURCE_PROJECTS_KS_PW}</storepass>