build: restore argLine to fix code coverage

Partially reverts da4fffc823

pom.xml

@@ -1,5 +1,5 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
 
     <groupId>de.stklcode.jvault</groupId>
@@ -43,13 +43,14 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <argLine />
     </properties>
 
     <dependencies>
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-databind</artifactId>
-             <version>2.19.1</version>
+            <version>2.19.1</version>
         </dependency>
         <dependency>
             <groupId>com.fasterxml.jackson.datatype</groupId>
@@ -128,7 +129,9 @@
                     <version>3.5.3</version>
                     <configuration>
                         <argLine>
-                            --add-opens de.stklcode.jvault.connector/de.stklcode.jvault.connector.test=com.fasterxml.jackson.databind
+                            @{argLine}
+                            --add-opens
+                            de.stklcode.jvault.connector/de.stklcode.jvault.connector.test=com.fasterxml.jackson.databind
                         </argLine>
                     </configuration>
                 </plugin>
@@ -158,6 +161,7 @@
                     <version>3.5.3</version>
                     <configuration>
                         <argLine>
+                            @{argLine}
                             --add-opens java.base/java.util=ALL-UNNAMED
                         </argLine>
                     </configuration>