test: increased time unit to make test less error-prone

Author: spacewander

t/108-timer-safe.t

@@ -81,16 +81,16 @@ qr/\[lua\] content_by_lua\(nginx\.conf:\d+\):\d+: elapsed: 0\.0(?:4[4-9]|5[0-6])
             local begin = ngx.now()
             local function f()
                 print("my lua timer handler")
-                ngx.sleep(0.02)
+                ngx.sleep(0.2)
                 print("elapsed: ", ngx.now() - begin)
             end
-            local ok, err = ngx.timer.at(0.05, f)
+            local ok, err = ngx.timer.at(0.5, f)
             if not ok then
                 ngx.say("failed to set timer: ", err)
                 return
             end
             ngx.say("registered timer")
-            ngx.sleep(0.05)
+            ngx.sleep(0.5)
         ';
     }
 --- request
@@ -116,7 +116,7 @@ registered timer
 --- error_log eval
 [
 qr/\[lua\] .*? my lua timer handler/,
-qr/\[lua\] content_by_lua\(nginx\.conf:\d+\):\d+: elapsed: 0\.0(?:6[4-9]|7[0-6])/,
+qr/\[lua\] content_by_lua\(nginx\.conf:\d+\):\d+: elapsed: 0\.(?:6[4-9]|7[0-6])/,
 "lua ngx.timer expired",
 "http lua close fake http connection"
 ]