puppet-lint: fix all "ERROR: tab character found", :retab with
2-space soft tabs per puppet style guide

PS2: add vim modeline as suggested

Change-Id: I9ae906c768319e6d81e8208d3be75996f0cda91c
Merge "puppet-lint: fix all "ERROR: tab character found", :retab with 2-space soft tabs per puppet style guide" into production