replacing usleep with AXIS2_USLEEP

diff --git a/samples/rm_echo_1_0_large_sequence/rm_echo.c b/samples/rm_echo_1_0_large_sequence/rm_echo.c
index 18daa50..c3ab22f 100644
--- a/samples/rm_echo_1_0_large_sequence/rm_echo.c
+++ b/samples/rm_echo_1_0_large_sequence/rm_echo.c
@@ -30,10 +30,8 @@
 #include <ctype.h>
 #include <neethi_policy.h>
 #include <neethi_util.h>
-#include <unistd.h>
 
 #define SANDESHA2_MAX_COUNT 8
-extern int usleep (__useconds_t __useconds);
 
 /* on_complete callback function */
 axis2_status_t AXIS2_CALL
@@ -303,7 +301,7 @@
             /* We are done with the callback */
             break;
         }
-        usleep(100000);
+        AXIS2_USLEEP(100000);
     }
     return;
 }
diff --git a/samples/rm_echo_1_1_large_sequence/rm_echo_1_1.c b/samples/rm_echo_1_1_large_sequence/rm_echo_1_1.c
index 7e6a197..fdb23cf 100644
--- a/samples/rm_echo_1_1_large_sequence/rm_echo_1_1.c
+++ b/samples/rm_echo_1_1_large_sequence/rm_echo_1_1.c
@@ -31,10 +31,8 @@
 #include <ctype.h>
 #include <neethi_util.h>
 #include <neethi_policy.h>
-#include <unistd.h>
 
 #define SANDESHA2_MAX_COUNT 4
-extern int usleep (__useconds_t __useconds);
 
 /* on_complete callback function */
 axis2_status_t AXIS2_CALL
@@ -310,7 +308,7 @@
             /* We are done with the callback */
             return;
         }
-        usleep(100000);
+        AXIS2_USLEEP(100000);
     }
     return;
 }