Remove confusing vcloud-query 'record type' column

vcloud-query with no options would return a list of 'queriable
Entity types', along with a comma-separated list of 'record formats'
available for this particular entity.

We only ever use the 'records' format. The other types just add noise.

Simplify the output of the tool to just list entity types
available in 'records' format.
Update available_query_types to be a simple list

We only care about querying the API for 'format=records'. The
other two formats ('references' and 'idrecords') are cluttering our
code.

This commit reduces the output of available_query_types to be a simple
array of entity types that are queriable in records format.

As a result, the output_available_query_types and associated tests are
updated to reflect the new return value.
Remove support for the :format Query API option

We have alrady removed support for the non-default :format options,
such as 'references' and 'idrecords'.

This change makes it clear that we do not support the selection of
these alternate formats from the query API. They are not relevant in
the context of Vcloud::Core use.
Merge branch 'master' into 62626870_remove_formats
update QueryRunner integration test

Output of QueryRunner#available_query_types has changed to return a simple list of entity types
version bump
Merge pull request #27 from alphagov/62626870_remove_formats

[#62626870] Remove Query API record format code