Adding config to avoid "gpg: signing failed: Inappropriate ioctl for device"

[skip ci]

Author: diemol

java/junit4/pom.xml

@@ -93,6 +93,12 @@
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-gpg-plugin</artifactId>
         <version>1.6</version>
+        <configuration>
+          <gpgArguments>
+            <arg>--pinentry-mode</arg>
+            <arg>loopback</arg>
+          </gpgArguments>
+        </configuration>
         <executions>
           <execution>
             <id>sign-artifacts</id>