Update to pynwb 3.0

[t-b]

rc1 is out, tested today works, see 1!

• Switch to 3.0.0 final
• Wait for new dandi version which supports it
• Apply script adaptations

git diff .
diff --git a/tools/nwb-read-tests/nwbv2-read-test.py b/tools/nwb-read-tests/nwbv2-read-test.py
index 65d915020..6a389683b 100755
--- a/tools/nwb-read-tests/nwbv2-read-test.py
+++ b/tools/nwb-read-tests/nwbv2-read-test.py
@@ -25,7 +25,7 @@ def checkFile(path):
         return 1

     # 1.) pynwb Validation
-    comp = run(["python", "-m", "pynwb.validate", path],
+    comp = run(["pynwb-validate", path],
                stdout=PIPE, stderr=STDOUT, universal_newlines=True, timeout=120)

     if comp.returncode != 0:
@@ -49,7 +49,7 @@ def checkFile(path):
         nwbfile = io.read()

         print(f"nwbfile: {nwbfile}")
-        print(f"ic_electrodes: {nwbfile.ic_electrodes}")
+        print(f"icephys_electrodes: {nwbfile.icephys_electrodes}")
         print(f"sweep_table: {nwbfile.sweep_table}")
         print(f"lab_meta_data: {nwbfile.lab_meta_data}")
         print(f"acquisition: {nwbfile.acquisition}")