Sets wait_jitter in worker_test.py (#1927)

Many tests in worker_test.py set wait_interval to 0.1 but leave
wait_jitter at its default value of 5.0. This sets wait_jitter to 0.05 in
all such tests, which maintains the expected 0.1 jitter time. This should
reduce each wait by about 2.5 seconds, and I've found that it decreases
the running time of the worker tests on my machine by about 15 seconds.

test/worker_test.py

@@ -545,7 +545,7 @@ def run(self):
         sch = Scheduler(retry_delay=100, remove_delay=1000, worker_disconnect_delay=10)
 
         with Worker(scheduler=sch, worker_id='X', keep_alive=True, count_uniques=True) as w:
-            with Worker(scheduler=sch, worker_id='Y', keep_alive=True, count_uniques=True, wait_interval=0.1) as w2:
+            with Worker(scheduler=sch, worker_id='Y', keep_alive=True, count_uniques=True, wait_interval=0.1, wait_jitter=0.05) as w2:
                 self.assertTrue(w.add(a))
                 self.assertTrue(w2.add(b))
 
@@ -579,7 +579,7 @@ def run(self):
         sch = Scheduler(retry_delay=100, remove_delay=1000, worker_disconnect_delay=10)
 
         with Worker(scheduler=sch, worker_id='X', keep_alive=True, count_uniques=True) as w:
-            with Worker(scheduler=sch, worker_id='Y', keep_alive=True, count_uniques=True, wait_interval=0.1) as w2:
+            with Worker(scheduler=sch, worker_id='Y', keep_alive=True, count_uniques=True, wait_interval=0.1, wait_jitter=0.05) as w2:
                 self.assertTrue(w.add(b))
                 self.assertTrue(w2.add(b))
 
@@ -1644,7 +1644,7 @@ def requires(self):
 
         wt = TestWrapperTask()
 
-        with Worker(scheduler=self.sch, worker_id='X', keep_alive=True, wait_interval=0.1) as w1:
+        with Worker(scheduler=self.sch, worker_id='X', keep_alive=True, wait_interval=0.1, wait_jitter=0.05) as w1:
             self.assertTrue(w1.add(wt))
 
             self.assertFalse(w1.run())
@@ -1683,9 +1683,9 @@ def requires(self):
 
         wt = TestWrapperTask()
 
-        with Worker(scheduler=self.sch, worker_id='X', keep_alive=True, wait_interval=0.1) as w1:
-            with Worker(scheduler=self.sch, worker_id='Y', keep_alive=True, wait_interval=0.1) as w2:
-                with Worker(scheduler=self.sch, worker_id='Z', keep_alive=True, wait_interval=0.1) as w3:
+        with Worker(scheduler=self.sch, worker_id='X', keep_alive=True, wait_interval=0.1, wait_jitter=0.05) as w1:
+            with Worker(scheduler=self.sch, worker_id='Y', keep_alive=True, wait_interval=0.1, wait_jitter=0.05) as w2:
+                with Worker(scheduler=self.sch, worker_id='Z', keep_alive=True, wait_interval=0.1, wait_jitter=0.05) as w3:
                     self.assertTrue(w1.add(wt))
                     self.assertTrue(w2.add(e2))
                     self.assertTrue(w3.add(e1))
@@ -1727,7 +1727,7 @@ def requires(self):
 
         wt = TestWrapperTask()
 
-        with Worker(scheduler=self.sch, worker_id='X', keep_alive=True, wait_interval=0.1) as w1:
+        with Worker(scheduler=self.sch, worker_id='X', keep_alive=True, wait_interval=0.1, wait_jitter=0.05) as w1:
             self.assertTrue(w1.add(wt))
 
             self.assertFalse(w1.run())
@@ -1765,9 +1765,9 @@ def requires(self):
 
         wt = TestWrapperTask()
 
-        with Worker(scheduler=self.sch, worker_id='X', keep_alive=True, wait_interval=0.1) as w1:
-            with Worker(scheduler=self.sch, worker_id='Y', keep_alive=True, wait_interval=0.1) as w2:
-                with Worker(scheduler=self.sch, worker_id='Z', keep_alive=True, wait_interval=0.1) as w3:
+        with Worker(scheduler=self.sch, worker_id='X', keep_alive=True, wait_interval=0.1, wait_jitter=0.05) as w1:
+            with Worker(scheduler=self.sch, worker_id='Y', keep_alive=True, wait_interval=0.1, wait_jitter=0.05) as w2:
+                with Worker(scheduler=self.sch, worker_id='Z', keep_alive=True, wait_interval=0.1, wait_jitter=0.05) as w3:
                     self.assertTrue(w1.add(wt))
                     self.assertTrue(w2.add(e1))
                     self.assertTrue(w3.add(s1))
@@ -1818,7 +1818,7 @@ def run(self):
 
         wt = TestWrapperTask()
 
-        with Worker(scheduler=self.sch, worker_id='X', keep_alive=True, wait_interval=0.1) as w1:
+        with Worker(scheduler=self.sch, worker_id='X', keep_alive=True, wait_interval=0.1, wait_jitter=0.05) as w1:
             self.assertTrue(w1.add(wt))
 
             self.assertFalse(w1.run())
@@ -1866,8 +1866,8 @@ def run(self):
 
         wt = TestWrapperTask()
 
-        with Worker(scheduler=self.sch, worker_id='X', keep_alive=True, wait_interval=0.1) as w1:
-            with Worker(scheduler=self.sch, worker_id='Y', keep_alive=True, wait_interval=0.1) as w2:
+        with Worker(scheduler=self.sch, worker_id='X', keep_alive=True, wait_interval=0.1, wait_jitter=0.05) as w1:
+            with Worker(scheduler=self.sch, worker_id='Y', keep_alive=True, wait_interval=0.1, wait_jitter=0.05) as w2:
                 self.assertTrue(w1.add(wt))
                 self.assertTrue(w2.add(s1))