Added option "--minsize"

  The 'minsize' parameter specifies the minimum allowable packet size on the dataplane.
  All test packet sizes use this as the floor.
  The default is 0.
diff --git a/tests/oft b/tests/oft
index 7229920..ce6e4ce 100755
--- a/tests/oft
+++ b/tests/oft
@@ -184,6 +184,7 @@
     "allow_user"         : False,
     "fail_skipped"       : False,
     "default_timeout"    : 2,
+    "minsize"            : 0,
 }
 
 # Default test priority
@@ -277,6 +278,10 @@
                       help="Return failure if any test was skipped")
     parser.add_option("--default-timeout", type="int",
                       help="Timeout in seconds for most operations")
+    parser.add_option("--minsize", type="int", 
+                      help="Minimum allowable packet size on the dataplane.", 
+                      default=0)
+
     # Might need this if other parsers want command line
     # parser.allow_interspersed_args = False
     (options, args) = parser.parse_args()
@@ -581,6 +586,7 @@
     _verb = 2
 
 oftest.ofutils.default_timeout = config["default_timeout"]
+testutils.MINSIZE = config['minsize']
 
 if os.getuid() != 0 and not config["allow_user"]:
     print "ERROR: Super-user privileges required. Please re-run with " \