flow manager: timing change

Set default timeout for the flow manager to wake up to 1 second. The 0.4 sec
performed best on a Xeon, but in kvm vm's it was horrible:

32 bit vm: 60% cpu for flowmgr when idle.
64 bit vm: 30% cpu for flowmgr when idle.

With the 1 second timeout both are at 0.3% cpu.

src/flow-manager.c

@@ -63,8 +63,8 @@
 extern int run_mode;
 
 /* 0.4 seconds */
-#define FLOW_NORMAL_MODE_UPDATE_DELAY_SEC 0
-#define FLOW_NORMAL_MODE_UPDATE_DELAY_NSEC 400000000
+#define FLOW_NORMAL_MODE_UPDATE_DELAY_SEC 1
+#define FLOW_NORMAL_MODE_UPDATE_DELAY_NSEC 0
 /* 0.01 seconds */
 #define FLOW_EMERG_MODE_UPDATE_DELAY_SEC 0
 #define FLOW_EMERG_MODE_UPDATE_DELAY_NSEC 10000000