Empty rolie (#357)

* Create ROLIE feed if summaries are empty

* Formatting, Remove sorting of 0 elements

* Handle minimum entry length error as warning in checker

* Use empty array instead of creating an empty array to reference

* Change schema to allow for empty entry arrays

* Use https://raw.githubusercontent.com/oasis-tcs/csaf/81b2663697958bc5f85d14372712a40028fb8338/csaf_2.0/json_schema/ROLIE_feed_json_schema.json as schema for ROLIE feeds

* Change label name from empty to undefined

* Change default of create_service_document for csaf_provider to true

* Config

* Count entries in csaf-checker, warn if there are none.

* Add Comments to csaf/rolie.go's CountEntries function

* Delete index.txt and changes.csv in aggregator if there are no entries.

* Create an empty ROLIE feed document when setting up folders during create

* nit: set update time stamp in structure init.

* Instantiate label checker only once.

* Ignore domain not having roles.

* provider: Create empty entry section in ROLIE feed.

* Stop check for domain if PMD check fails

* Add missing continue statement

* Report missing ROLIE feed entries in ROLIE feed, not Provider Metadata

* Do not ommit empty entries in ROLIE feeds.

* Fixed error handling problem introduced by faulty merge. Removed unused errStop handling while there.

---------

Co-authored-by: JanHoefelmeyer <hoefelmeyer.jan@gmail.com>
Co-authored-by: Sascha L. Teichmann <sascha.teichmann@intevation.de>
Co-authored-by: JanHoefelmeyer <Jan Höfelmeyer jhoefelmeyer@intevation.de>

cmd/csaf_provider/rolie.go

@@ -110,6 +110,7 @@ func (c *controller) extendROLIE(
 					Scheme: "urn:ietf:params:rolie:category:information-type",
 					Term:   "csaf",
 				}},
+				Entry: []*csaf.Entry{},
 			},
 		}
 	}