test: reduce delay in wait_until from 0.5s to 0.05s

Same delay is used for Bitcoin Core. Though, it can be appliable
directly for each usages such as quorum generation or waiting
for IS lock. It happends because some functional tests not only
waiting during delay, but also does something strange such as
bumping mocktime or generating new blocks. Also, some works during
quorum generation are assuming to be done while we waiting, but it's
not properly validated after delay, just assumed as it is done.

Author: knst

test/functional/test_framework/test_framework.py

@@ -898,7 +898,7 @@ def _initialize_mocktime(self, is_genesis):
         for node in self.nodes:
             node.mocktime = self.mocktime
 
-    def wait_until(self, test_function, timeout=60, lock=None, sleep=0.5, do_assert=True):
+    def wait_until(self, test_function, timeout=60, lock=None, sleep=0.05, do_assert=True):
         return wait_until_helper(test_function, timeout=timeout, lock=lock, timeout_factor=self.options.timeout_factor, sleep=sleep, do_assert=do_assert)
 
     # Private helper methods. These should not be accessed by the subclass test scripts.

test/functional/test_framework/util.py

@@ -247,7 +247,7 @@ def satoshi_round(amount):
     return Decimal(amount).quantize(Decimal('0.00000001'), rounding=ROUND_DOWN)
 
 
-def wait_until_helper(predicate, *, attempts=float('inf'), timeout=float('inf'), sleep=0.5, timeout_factor=1.0, lock=None, do_assert=True, allow_exception=False):
+def wait_until_helper(predicate, *, attempts=float('inf'), timeout=float('inf'), sleep=0.05, timeout_factor=1.0, lock=None, do_assert=True, allow_exception=False):
     """Sleep until the predicate resolves to be True.
 
     Warning: Note that this method is not recommended to be used in tests as it is