Move openapi files to a common directory

Move openapi files to common directory.
Ignore SME openapi files from source.

Issue-ID: NONRTRIC-952
Signed-off-by: aravind.est <aravindhan.a@est.tech>
Change-Id: Ic269de937cad634c7487b7563cb5f075b345b532
diff --git a/.gitignore b/.gitignore
index 549e00a..2cdd29e 100755
--- a/.gitignore
+++ b/.gitignore
@@ -31,3 +31,6 @@
 
 ### VS Code ###
 .vscode/
+
+
+openapi/sme/