The HotRod server build fails if test keys already exist

[INFO] --- keytool-maven-plugin:1.5:generateKeyPair (password_server) @ infinispan-server-hotrod ---
[INFO] /bin/sh -c cd /home/dan/Work/infinispan/server/hotrod && /home/dan/Tools/jdk1.8.0_121/jre/../bin/keytool -genkeypair -v -keystore /home/dan/Work/infinispan/server/hotrod/target/test-classes/password_server_keystore.jks -storepass secret -alias default -dname 'CN=HotRod_1,OU=Infinispan,O=JBoss,L=Red Hat,ST=World,C=WW' -keypass secret -validity 365 -keyalg RSA -keysize 2048
[INFO] keytool error: java.lang.Exception: Key pair not generated, alias <default> already exists
[INFO] java.lang.Exception: Key pair not generated, alias <default> already exists
[INFO] 	at sun.security.tools.keytool.Main.doGenKeyPair(Main.java:1597)
[INFO] 	at sun.security.tools.keytool.Main.doCommands(Main.java:966)
[INFO] 	at sun.security.tools.keytool.Main.run(Main.java:343)
[INFO] 	at sun.security.tools.keytool.Main.main(Main.java:336)