Convert tabs to spaces basic refactoring

Change tabs into spaces for checkstyle fixes in ONAP REST module of
policy engine. These changes come in way for review. Hence doing them
before refactoring is better.

Issue-ID: POLICY-1014
Change-Id: I31a372ae527946927157bc23b576f3066679b0ae
Signed-off-by: Krishnajinka <kris.jinka@samsung.com>
141 files changed