dmi plugin sync openapi yml

- copy target/generated-sources/swagger/openapi.yaml → docs/api/swagger/openapi.yaml
- fixed the tox.ini for the documentation build issue
- updated description for topic paramter

Issue-ID: CPS-1276
Change-Id: I0771fd6b7a8fda5085a535e02cd40fa49e6b8b6f
Signed-off-by: mpriyank <priyank.maheshwari@est.tech>
diff --git a/openapi/components.yml b/openapi/components.yml
index 212ddf0..049701e 100644
--- a/openapi/components.yml
+++ b/openapi/components.yml
@@ -201,7 +201,7 @@
     topicParamInQuery:
       name: topic
       in: query
-      description: valid topic name passed from client(NCMP).
+      description: topic name passed from client(NCMP).
       required: false
       schema:
         type: string