testing: Add missing snmp_shutdown() calls

Author: bvanassche

testing/fulltests/snmpv3/T050etimetest_capp.c

@@ -165,6 +165,7 @@ main(int argc, char **argv)
         failcount += test_etime();
     }
 
+    snmp_shutdown("testing");
 
     fprintf(stdout, "1..%d\n", testcount);
     return 0;

testing/fulltests/unit-tests/T102pdu_build_clib.c

@@ -74,5 +74,6 @@ OKF((rc == SNMPERR_SUCCESS),
 
 free(packet);
 netsnmp_cleanup_session(&session);
+snmp_shutdown("testing");
 
 SOCK_CLEANUP;