Fix stupid error in dockerfile

Dockerfile

@@ -56,7 +56,7 @@ RUN apt-get install -y python-requests && apt-get clean
 # Missing perl dependencies
 RUN apt-get update && apt-get install -y \
     libhtml-strip-perl libipc-run3-perl paps \
-    libdancer-perl libobject-tiny-perl libxml-libxml-simple-perl libconfig-merge-perl && \
+    libdancer-perl libobject-tiny-perl libxml-libxml-simple-perl libconfig-merge-perl \
     libyaml-libyaml-perl && \
     apt-get clean