Update earth_relief (SRTM15+ v2.7)

[Esteban82]

There is a new SRTM15+ version (2.7).

I will update the earth_relief grids (to version v2.7) in the main server.

The steps to follow are:

• Download the new version and process it.
• Update the files in the candidate server.
• Test the files in candidate.generic-mapping-tools.org.
• Update the info in gmt_data_server.txt in the candidate server.
• Update the files in /export/gmtserver/gmt/data/server/earth/earth_relief/.
• in the remote-datasets repository, update the information for of the grid and in the changelog.
• Close this issue.

[Esteban82]

I got confused and made the edits directly in master. I don't think it's worth it to revert the changes. Right now I am uploading the data to the candidate server. I hope to be finished today.

[Esteban82]

I think the data in the candidate server is ready to be test it. I am having some internet issues (I think) so I cannot confirm it.

[Esteban82]

I tested the candidate server and now works well.

[joa-quim]

Thanks Federico. I've been with the mind occupied with other matters.

[Esteban82]

I just updated the data in the oceania server.

[Esteban82]

I also updated the date of the release in the changelog.