[MCHANGES-352] Plugin should report when not all issues are returned

**[Sebb](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=sebb@apache.org)** opened **[MCHANGES-352](https://issues.apache.org/jira/browse/MCHANGES-352?redirect=false)** and commented

The plugin should provide some kind of report when not all requested issues have been returned.

This information is available in the response, for example (from -X output):

Payload: {"expand":"schema,names","startAt":0,"maxResults":100,"total":141,

If total is greater than maxResults, then some issues have been dropped.

This could be reported as a Maven warning and/or added to the report itself.

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No further details from [MCHANGES-352](https://issues.apache.org/jira/browse/MCHANGES-352?redirect=false)

No file or test is named. Trace the plugin's handling of the response payload, inspect how total and maxResults are exposed, and add coverage for a response where total exceeds maxResults; done means the missing issues are reported as a Maven warning or in the report.

Written by the indexing model from the issue text.