[Tests] Choose 7.0 if nightly image

- Not 6.0.11

.github/workflows/pythonapp.yml

@@ -46,6 +46,8 @@ jobs:
         # exit-zero treats all errors as warnings.
         flake8 . --count --exit-zero --statistics
     - name: Test ${{ matrix.ki_release }}
+      env:
+        KI_RELEASE: ${{ matrix.ki_release }}
       run: |
         rm -rf output
         rm -f tests/.local

g1.sh

@@ -1,3 +1,6 @@
 #!/bin/sh
+if [ $KI_RELEASE == "nightly" ]; then
+     export KIAUS_USE_NIGHTLY="7.0"
+fi
 # Fast tests
 pytest-3 -v --durations=0 -m "not slow" -n 2 --test_dir=output

g2.sh

@@ -1,4 +1,7 @@
 #!/bin/sh
+if [ $KI_RELEASE == "nightly" ]; then
+     export KIAUS_USE_NIGHTLY="7.0"
+fi
 set -e
 # Eeschema tests
 pytest-3 -v --durations=0 -m "eeschema" --test_dir=output

g3.sh

@@ -1,3 +1,6 @@
 #!/bin/sh
+if [ $KI_RELEASE == "nightly" ]; then
+     export KIAUS_USE_NIGHTLY="7.0"
+fi
 # PCBnew tests
 pytest-3 -v --durations=0 -m "pcbnew" --test_dir=output