Re-enable pynn-brainscales (with new version)

spack.yaml

@@ -28,7 +28,7 @@ spack:
     - py-formencode %gcc@10.3.0
     - tvb-framework ^binutils+ld+gold %gcc@10.3.0
     - meta-brainscales %gcc@10.3.0
-    #- pynn-brainscales@1.0-rc2 ^log4cxx@0.10.0 ^googletest@1.11.0:+gmock %gcc@10.3.0
+    - pynn-brainscales@2.0-rc0 ^log4cxx@0.10.0 ^googletest@1.11.0:+gmock %gcc@10.3.0
     # demo for codejam12
     - funniest1022 %gcc@10.3.0
     # NRP