Correction of failing ecdsa & pk tests

Signed-off-by: TRodziewicz <tomasz.rodziewicz@mobica.com>
diff --git a/tests/suites/test_suite_ecdsa.function b/tests/suites/test_suite_ecdsa.function
index 8157234..41beb52 100644
--- a/tests/suites/test_suite_ecdsa.function
+++ b/tests/suites/test_suite_ecdsa.function
@@ -599,7 +599,8 @@
     cnt_restart = 0;
     do {
         ret = mbedtls_ecdsa_write_signature_restartable( &ctx,
-                md_alg, hash, hlen, sig, &slen, NULL, NULL, &rs_ctx );
+                md_alg, hash, hlen, sig, &slen, mbedtls_test_rnd_std_rand, NULL, 
+                &rs_ctx );
     } while( ret == MBEDTLS_ERR_ECP_IN_PROGRESS && ++cnt_restart );
 
     TEST_ASSERT( ret == 0 );
@@ -614,7 +615,8 @@
     if( min_restart > 0 )
     {
         ret = mbedtls_ecdsa_write_signature_restartable( &ctx,
-                md_alg, hash, hlen, sig, &slen, NULL, NULL, &rs_ctx );
+                md_alg, hash, hlen, sig, &slen, mbedtls_test_rnd_std_rand, NULL, 
+                &rs_ctx );
         TEST_ASSERT( ret == MBEDTLS_ERR_ECP_IN_PROGRESS );
     }