[qa] Rewrite BIP66 functional tests

Rewrite the BIP66 functional tests to reflect height-based activation,
and move it out of the extended test suite.

Remove the unnecessary bipdersig.py test

test/functional/test_runner.py

@@ -113,6 +113,7 @@ BASE_SCRIPTS= [
     'listsinceblock.py',
     'p2p-leaktests.py',
     'wallet-encryption.py',
+    'bipdersig-p2p.py',
     'bip65-cltv-p2p.py',
     'uptime.py',
 ]
@@ -137,8 +138,6 @@ EXTENDED_SCRIPTS = [
     'rpcbind_test.py',
     # vv Tests less than 30s vv
     'assumevalid.py',
-    'bipdersig-p2p.py',
-    'bipdersig.py',
     'example_test.py',
     'getblocktemplate_proposals.py',
     'txn_doublespend.py',