fix ci to use attrs branches of NeuroML and MDF

This is a temporary change to CI to test against the attrs
branches of MDF and NeuroML. This is just until the PRs for these
repos are moved.

Author: davidt0x

.github/workflows/ci.yml

@@ -46,7 +46,8 @@ jobs:
 
     - name: Install & test NeuroMLlite
       run: |
-          git clone https://github.com/NeuroML/NeuroMLlite.git
+#          git clone https://github.com/NeuroML/NeuroMLlite.git
+          git clone --branch attrs2 https://github.com/davidt0x/NeuroMLlite.git
           cd NeuroMLlite
           git checkout modelspec # specific branch...
           pip install .
@@ -60,19 +61,19 @@ jobs:
       run: python -m pip install git+https://github.com/SheffieldML/GPy.git@devel
 
 
-#    - name: Install MDF
-#      if: ${{ matrix.python-version != '2.7' }}
-#      run: |
-#
-#          # Install psyneulink - mdf branch
-#          python -m pip install git+https://github.com/PrincetonUniversity/PsyNeuLink.git@mdf
-#
-#          git clone https://github.com/ModECI/MDF.git
-#          cd MDF
-#          git checkout modelspec  # specific branch...
-#          pip install .
-#          cd examples/MDF
-#          python arrays.py -run   # test one example
+    - name: Install MDF
+      if: ${{ matrix.python-version != '2.7' }}
+      run: |
+
+          # Install psyneulink - mdf branch
+          python -m pip install git+https://github.com/PrincetonUniversity/PsyNeuLink.git@mdf
+
+          git clone --branch attrs https://github.com/ModECI/MDF.git
+          cd MDF
+          git checkout modelspec  # specific branch...
+          pip install .
+          cd examples/MDF
+          python arrays.py -run   # test one example
 
     - name: Final version info
       run: |