spec: drop potential pre-compiled java files

This just protect us against upstream failures during future
releases.

Version: 1.0.0~beta.2-2

ongres-scram.spec

@@ -1,6 +1,6 @@
 Name:		ongres-scram
 Version:	1.0.0~beta.2
-Release:	1%{?dist}
+Release:	2%{?dist}
 Summary:	Salted Challenge Response Authentication Mechanism (SCRAM) - Java Implementation
 License:	BSD
 URL:		https://github.com/ongres/scram
@@ -34,6 +34,7 @@ This package contains the %{name} parent POM.
 
 %prep
 %setup -q -n scram-1.0.0-beta.2
+find \( -name '*.jar' -o -name '*.class' \) -delete
 %pom_remove_plugin :nexus-staging-maven-plugin
 %pom_remove_plugin :maven-source-plugin
 %pom_remove_plugin :maven-dependency-plugin client
@@ -57,5 +58,8 @@ This package contains the %{name} parent POM.
 %license LICENSE
 
 %changelog
+* Mon Nov 27 2017 Pavel Raiskup <praiskup@redhat.com> - 1.0.0~beta.2-2
+- drop potential pre-compiled files from release tarball
+
 * Fri Nov 24 2017 Augusto Caringi <acaringi@redhat.com> 1.0.0~beta.2-1
 - initial rpm