Install debug tools: ldap utils and sasl modules
diff --git a/docker/maven-build/Dockerfile b/docker/maven-build/Dockerfile
index 25ba22d..6e6ab27 100644
--- a/docker/maven-build/Dockerfile
+++ b/docker/maven-build/Dockerfile
@@ -25,7 +25,7 @@
 # Base images maven:3-openjdk-*-slim are based on Debian
 RUN \
     apt-get update && \
-    DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends libgtk-3-0 libxtst6 xvfb krb5-config krb5-user dpkg rpm nsis && \
+    DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends libgtk-3-0 libxtst6 xvfb iputils-ping ldap-utils libsasl2-modules-ldap libsasl2-modules-gssapi-mit krb5-config krb5-user dpkg rpm nsis && \
     rm -rf /var/lib/apt/lists/*
 
 # Create the temp dir for Xvfb