nslcd is removed and nslcd.conf no longer presents on Debian.
This change removed nslcd.conf from the collect_mask_passwords
script.
Test Plan:
PASS: After system deployed, run "collect" successfully.
Story: 2009834
Task: 46171
Signed-off-by: Andy Ning <andy.ning@windriver.com>
Change-Id: I2450fe4463565e555b47f134aa4683b62e3ed511