update CPS submodule

libcps @ bf6080cc

-Subproject commit 4b2115cbded116aa64299f36bfb8c197fe2abb4f
+Subproject commit bf6080cc90e1f1a53af345bbc540d5ea09672b96

Packaging/Docker/Dockerfile.ubuntu

-FROM ubuntu:16.04
-
-LABEL \
-	org.label-schema.schema-version = "1.0" \
-	org.label-schema.name = "DPsim" \
-	org.label-schema.license = "GPL-3.0" \
-	org.label-schema.vendor = "Institute for Automation of Complex Power Systems, RWTH Aachen University" \
-	org.label-schema.author.name = "Steffen Vogel" \
-	org.label-schema.author.email = "stvogel@eonerc.rwth-aachen.de" \
-	org.label-schema.url = "http://fein-aachen.org/projects/dpsim/" \
-	org.label-schema.vcs-url = "https://git.rwth-aachen.de/acs/core/simulation/DPsim"
-
-RUN apt-get -y update &&\
-    apt-get -y install \
-	apt-transport-https ca-certificates
-
-RUN echo "deb https://packages.fein-aachen.org/debian/ stable main" >> /etc/apt/sources.list.d/fein.list
-
-RUN apt-get -y update
-
-# Toolchain
-RUN apt-get -y install \
-	build-essential \
-	make cmake \
-	doxygen \
-	graphviz \
-	python3-pip \
-	python3-dev \
-	libeigen3-dev \
-	libsundials-serial-dev
-
-# Python Packages
-ADD requirements.txt .
-RUN pip3 install --upgrade pip && \
-    pip3 install -r requirements.txt
\ No newline at end of file