moves up task to free space

.github/workflows/system_testing.yml

@@ -36,6 +36,12 @@ jobs:
         run: |
           df -h
 
+      - name: Frees Disk Space (Ubuntu)
+        uses: jlumbroso/[email protected]
+        with:
+          # this might remove tools that are actually needed, when set to "true"
+          tool-cache: true
+
       - name: checkout repository
         uses: actions/checkout@v2
 
@@ -77,12 +83,6 @@ jobs:
           df -h
           bash src/setup_dependency_datasets.sh
 
-      - name: Frees Disk Space (Ubuntu)
-        uses: jlumbroso/[email protected]
-        with:
-          # this might remove tools that are actually needed, when set to "true"
-          tool-cache: true
-
       - name: Run QuaC system testing - WGS mode AND no prior QC data
         run: |
           df -h