Added 'make test' as part of docker files and removed it from travis.yml
diff --git a/tests/dockerfiles/Debian_testing.docker b/tests/dockerfiles/Debian_testing.docker
index c87e7dd..9cdd389 100644
--- a/tests/dockerfiles/Debian_testing.docker
+++ b/tests/dockerfiles/Debian_testing.docker
@@ -24,4 +24,5 @@
 RUN cmake .. && \
     make && \
     make install && \
-    ldconfig
+    ldconfig && \
+    make test