scripted-diff: replace remaining Python test equality asserts

Some Python functional tests still use plain `assert x == y`.
The earlier commits convert the ambiguous assert patterns by hand, so this commit can rewrite the remaining safe cases mechanically.
The verify script excludes `wallet_bumpfee.py`, `test_framework/netutil.py`, and `test_framework/authproxy.py`, which still contain assert forms that the plain line-based substitution would misidentify.

-BEGIN VERIFY SCRIPT-
perl -pi -e 's/^(\s*)assert (.+?) == ([^,#]+?)$/\1assert_equal(\2, \3)/' $(git ls-files -- 'test/functional' \
':(exclude)test/functional/wallet_bumpfee.py' ':(exclude)test/functional/test_framework/netutil.py' ':(exclude)test/functional/test_framework/authproxy.py')
-END VERIFY SCRIPT-

test/functional/mining_getblocktemplate_longpoll.py

@@ -37,7 +37,7 @@ class GetBlockTemplateLPTest(BitcoinTestFramework):
         template = self.nodes[0].getblocktemplate({'rules': ['segwit']})
         longpollid = template['longpollid']
         template2 = self.nodes[0].getblocktemplate({'rules': ['segwit']})
-        assert template2['longpollid'] == longpollid
+        assert_equal(template2['longpollid'], longpollid)
 
         self.log.info("Test that longpoll waits if we do nothing")
         thr = LongpollThread(self.nodes[0])