NSM: remove sguild DEBUG 1 from postinst

[dougburks]

Issue 924 changed sguild's DEBUG level from 2 to 1 in the NSM postinst:

#924

Security-Onion-Solutions/securityonion-nsmnow-admin-scripts@8114140

Folks that configure syslog-ng to grab alerts from sguild.log need DEBUG 2:
https://groups.google.com/d/topic/security-onion/-9vWMV-R3eM/discussion

DEBUG 1 will still be the default for new installations, we just won't modify any existing installations.

[dougburks]

commit:
Security-Onion-Solutions/securityonion-nsmnow-admin-scripts@4f66917

[dougburks]

submitted for testing:
https://groups.google.com/d/topic/security-onion-testing/tGXKlYusqLg/discussion

[dougburks]

published:
http://blog.securityonion.net/2016/07/securityonion-nsmnow-admin-scripts.html