adjust some test timeouts

pkgs/racket-test-core/tests/racket/info.rkt

@@ -1,3 +1,3 @@
 #lang info
 
-(define test-timeouts '(("test.rkt" 1000)))
+(define test-timeouts '(("test.rkt" 1500)))

pkgs/racket-test/tests/racket/contract/class.rkt

@@ -1,6 +1,10 @@
 #lang racket/base
 (require "test-util.rkt")
 
+(module+ test
+  (module config info
+    (define timeout 180)))
+
 (parameterize ([current-contract-namespace
                 (make-basic-contract-namespace 
                  'racket/class

pkgs/racket-test/tests/racket/stress/log-receiver.rkt

@@ -1,5 +1,9 @@
 #lang racket/base
 
+(module+ test
+  (module config info
+    (define timeout 300)))
+
 (define (do-thread t) (thread t))
 (set! do-thread do-thread)