Properly generate scripts of `robotframework` egg

This will generate `bin/pybot`, `bin/robot` and `bin/rebot` scripts.
`op_robot_tests/rebot.py` is not needed anymore.

@@ -14,6 +14,7 @@ recipe = zc.recipe.egg
 eggs =
     op_robot_tests
     openprocurement_client
+    robotframework
     robotframework-lint
     robotframework-debuglibrary
     robot_tests.broker.dzo

-from robot.rebot import rebot_cli
-import sys
-
-def rebot():
-    rebot_cli(sys.argv[1:])
\ No newline at end of file

@@ -41,7 +41,6 @@ setup(name='op_robot_tests',
           'console_scripts': [
               'openprocurement_tests = op_robot_tests.runner:runner',
               'op_tests = op_robot_tests.runner:runner',
-              'rebot = op_robot_tests.rebot:rebot'
           ],
       }
       )