Add generation of API yaml file

Change-Id: I893e4ecb0c89b92d5c5cdecd2dc72a603d5340bb
Issue-ID: NONRTRIC-354
Signed-off-by: elinuxhenrik <henrik.b.andersson@est.tech>
diff --git a/.gitignore b/.gitignore
index 26c6731..02f4f98 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,6 +3,8 @@
 .tox
 docs/_build/
 .DS_STORE
+.swagger*
+docs/offeredapis/swagger/README.md
 
 # Eclipse
 .checkstyle