Edited the name of the AAI certificates

Edited the name of the AAI certificates.

Issue-ID: INT-444
Change-Id: Ib828fa031bd4fbdd45266cbd4cda2bd74aeaa36e
Signed-off-by: Ankitkumar Patel <ankit@research.att.com>

diff --git a/aai.cer b/aai_cert.cer
similarity index 100%
rename from aai.cer
rename to aai_cert.cer

diff --git a/aai.key b/aai_key.key
similarity index 100%
rename from aai.key
rename to aai_key.key