Added 'import sys' in feature.py file (sonic-net#1232)

If FEATURE table is not present in CONFIG_DB.

When I issue - "config feature state nat enabled", seeing below errors

root@sonic:/home/admin# config feature state nat enabled
Feature 'nat' doesn't exist
Traceback (most recent call last):
File "/usr/local/bin/config", line 10, in
sys.exit(config())
File "/usr/local/lib/python2.7/dist-packages/click/core.py", line 764, in call
return self.main(*args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/click/core.py", line 717, in main
rv = self.invoke(ctx)
File "/usr/local/lib/python2.7/dist-packages/click/core.py", line 1137, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/usr/local/lib/python2.7/dist-packages/click/core.py", line 1137, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/usr/local/lib/python2.7/dist-packages/click/core.py", line 956, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "/usr/local/lib/python2.7/dist-packages/click/core.py", line 555, in invoke
return callback(*args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/click/decorators.py", line 64, in new_func
return ctx.invoke(f, obj, *args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/click/core.py", line 555, in invoke
return callback(*args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/config/feature.py", line 26, in feature_state
sys.exit(1)
NameError: global name 'sys' is not defined
root@sonic:/home/admin#

Fix: Added 'import sys' in feature.py file.

After Fix:
root@sonic:/home/admin# config feature state nat enabled
Feature 'nat' doesn't exist
root@sonic:/home/admin#

Signed-off-by: Akhilesh Samineni [email protected]

Signed-off-by: Akhilesh Samineni <[email protected]>

Author: AkhileshSamineni

config/feature.py

@@ -1,4 +1,5 @@
 import click
+import sys
 
 from utilities_common.cli import AbbreviationGroup, pass_db