Update our coverage metadata to incorporate suggested template

[cstephen]

We may want to consider adding the following info on top of what we already have stored in our coverage metadata:

<ras:rasdamanCoverageMetadata>
  <ras:catalog>
    <ras:title>...</ras:title>
    <ras:thumbnail>http://url/to/thumbnail</ras:thumbnail>
    <ras:description><![CDATA[ ... ]]></ras:description>
    <ras:providerSource>http://url/to/source</ras:providerSource>
    <ras:providerName>...</ras:providerName>
    <ras:providerCopyrightHolder>...</ras:providerCopyrightHolder>
    <ras:providerTerms>http://url/to/license/info</ras:providerTerms>
    <ras:ourTerms>http://url/to/our/terms</ras:ourTerms>
  </ras:catalog>
</ras:rasdamanCoverageMetadata>

This was provided as an example from the Rasdaman team.