Add user precice again to fix dockerfile. See #191. #701

	name: Run preCICE Solverdummies
	on:
	push:
	branches:
	- "*"
	pull_request:
	branches:
	- "*"
	jobs:
	run_solverdummies:
	name: Run solverdummies
	runs-on: ubuntu-latest
	container:
	image: precice/precice:develop
	options: --user root
	steps:
	- name: Checkout Repository
	uses: actions/checkout@v2
	- name: Install Dependencies
	run: \|
	apt-get -qq update
	apt-get -qq install software-properties-common python3-dev python3-pip git apt-utils pkg-config
	rm -rf /var/lib/apt/lists/*
	pip3 install --upgrade --user pip
	- name: Install bindings
	run: pip3 install --user .
	- name: Check whether preCICE was built with MPI # reformat version information as a dict and check whether preCICE was compiled with MPI
	run: python3 -c "import precice; assert({item.split('=')[0]:item.split('=')[-1] for item in str(precice.get_version_information()).split(';')}['PRECICE_FEATURE_MPI_COMMUNICATION']=='Y')"
	- name: Run solverdummies
	run: \|
	cd examples/solverdummy/
	python3 solverdummy.py precice-config.xml SolverOne & python3 solverdummy.py precice-config.xml SolverTwo

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