API documentation guide

Guide how to use Swagger and swaggerv2dcc directive
Add 2 JSON Swagger files
Add code block

Change-Id: If3af3f20509db2cc47bdb2cf3db9b44d8a1bcdc7
Issue-ID: DOC-426
Signed-off-by: Eric Debeau <eric.debeau@orange.com>
diff --git a/docs/guides/onap-developer/how-to-use-docs/index.rst b/docs/guides/onap-developer/how-to-use-docs/index.rst
index a2cdd6e..90c6575 100644
--- a/docs/guides/onap-developer/how-to-use-docs/index.rst
+++ b/docs/guides/onap-developer/how-to-use-docs/index.rst
@@ -10,6 +10,7 @@
    documentation-guide
    style-guide
    include-documentation
+   api-swagger-guide
    converting-formats
    addendum