tests: relaxed the checks to account for timing races in error logs from multiple cache helper processes.

Author: agentzh

t/124-init-worker.t

@@ -781,11 +781,15 @@ ok
     GET /t
 --- grep_error_log eval: qr/lua close the global Lua VM \S+ in the cache helper process \d+|lua close the global Lua VM \S+$/
 --- grep_error_log_out eval
-qr/\Alua close the global Lua VM ([0-9A-F]+) in the cache helper process \d+
+qr/\A(?:lua close the global Lua VM ([0-9A-F]+) in the cache helper process \d+
 lua close the global Lua VM \1
 lua close the global Lua VM \1 in the cache helper process \d+
 lua close the global Lua VM \1
-(?:lua close the global Lua VM [0-9A-F]+
+|lua close the global Lua VM ([0-9A-F]+) in the cache helper process \d+
+lua close the global Lua VM \2 in the cache helper process \d+
+lua close the global Lua VM \2
+lua close the global Lua VM \2
+)(?:lua close the global Lua VM [0-9A-F]+
 )*\z/
 --- no_error_log
 [error]
@@ -815,11 +819,15 @@ start privileged agent process
     GET /t
 --- grep_error_log eval: qr/lua close the global Lua VM \S+ in the cache helper process \d+|lua close the global Lua VM \S+$/
 --- grep_error_log_out eval
-qr/\Alua close the global Lua VM ([0-9A-F]+) in the cache helper process \d+
+qr/\A(?:lua close the global Lua VM ([0-9A-F]+) in the cache helper process \d+
 lua close the global Lua VM \1
 lua close the global Lua VM \1 in the cache helper process \d+
 lua close the global Lua VM \1
-(?:lua close the global Lua VM [0-9A-F]+
+|lua close the global Lua VM ([0-9A-F]+) in the cache helper process \d+
+lua close the global Lua VM \2 in the cache helper process \d+
+lua close the global Lua VM \2
+lua close the global Lua VM \2
+)(?:lua close the global Lua VM [0-9A-F]+
 )*\z/
 --- no_error_log
 [error]
@@ -850,11 +858,15 @@ start privileged agent process
     GET /t
 --- grep_error_log eval: qr/lua close the global Lua VM \S+ in the cache helper process \d+|lua close the global Lua VM \S+$/
 --- grep_error_log_out eval
-qr/\Alua close the global Lua VM ([0-9A-F]+) in the cache helper process \d+
+qr/\A(?:lua close the global Lua VM ([0-9A-F]+) in the cache helper process \d+
 lua close the global Lua VM \1
 lua close the global Lua VM \1 in the cache helper process \d+
 lua close the global Lua VM \1
-(?:lua close the global Lua VM [0-9A-F]+
+|lua close the global Lua VM ([0-9A-F]+) in the cache helper process \d+
+lua close the global Lua VM \2 in the cache helper process \d+
+lua close the global Lua VM \2
+lua close the global Lua VM \2
+)(?:lua close the global Lua VM [0-9A-F]+
 )*\z/
 --- error_log eval
 qr/start privileged agent process \d+/