Merge branch 'clean_up_tests' into 'master'

.gitlab-ci.yml

images/workflow_dag.svg

scripts/labkey_api.py

snakemake/create_snakemake_flowchart.sh

snakemake/run_snakefile.sh

snakemake/run_test.sh

tests/samples.tsv

...art/.snakemake/log/2020-02-04T153123.241756.snakemake.log

...art/.snakemake/log/2020-02-04T153204.024195.snakemake.log

...art/.snakemake/log/2020-02-04T153253.153466.snakemake.log

...art/.snakemake/log/2020-02-04T153305.441930.snakemake.log

...art/.snakemake/log/2020-02-04T153343.033762.snakemake.log

...art/.snakemake/log/2020-02-04T153536.300877.snakemake.log

...art/.snakemake/log/2020-02-04T154438.496145.snakemake.log

tests/test_create_dag_chart/config.yaml

...s/test_create_dag_chart/input_files/GSM1502498_1.fastq.gz

...s/test_create_dag_chart/input_files/GSM1502498_2.fastq.gz

...s/test_create_dag_chart/input_files/GSM1502500_1.fastq.gz

...s/test_create_dag_chart/input_files/GSM1502500_2.fastq.gz

tests/test_create_dag_chart/input_files/samples.tsv