Enable chromeos reimage function from autoserv command line. Part I.

server/site_autoserv_parser.py

 __author__ = "raphtee@google.com (Travis Miller)"
+__author__ = "ericli@chromium.com (Eric Li)"
 
 import common
 from autotest_lib.server.autoserv_parser import base_autoserv_parser
 
 
 add_usage = """\
 """
 
 
 class site_autoserv_parser(base_autoserv_parser):
     def get_usage(self):
         usage = super(site_autoserv_parser, self).get_usage()
         return usage+add_usage
+
+
+    def setup_options(self):
+        base_autoserv_parser.setup_options(self)
+        self.parser.add_option("--image", action="store", type="string",
+                               dest="image",
+                               help="Full path of an osimage to install.")   
+
+
+    def parse_args(self):
+        base_autoserv_parser.parse_args(self)
+        if self.options.image:
+            self.options.install_before = True
+