JCLOUDS-743 - Remove vcloud providers that no longer support version 1.0

bluelock-vcloud-zone01 and greenhousedata-element-vcloud are no longer compatible with vcloud 1.0, so needs to be removed. We can consider re-adding once we promote vcloud-director out of labs.

```bash
$ curl -s https://zone01.bluelock.com/api/versions|grep Version
<SupportedVersions xmlns="http://www.vmware.com/vcloud/versions" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.vmware.com/vcloud/versions http://10.101.41.40/api/versions/schema/versions.xsd">
    <VersionInfo>
        <Version>1.5</Version>
    </VersionInfo>
    <VersionInfo>
        <Version>5.1</Version>
    </VersionInfo>
    <VersionInfo>
        <Version>5.5</Version>
    </VersionInfo>
</SupportedVersions>
$ curl -s https://mycloud.greenhousedata.com/api/versions|grep Version
<SupportedVersions xmlns="http://www.vmware.com/vcloud/versions" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.vmware.com/vcloud/versions http://192.168.170.73/api/versions/schema/versions.xsd">
    <VersionInfo>
        <Version>1.5</Version>
    </VersionInfo>
    <VersionInfo>
        <Version>5.1</Version>
    </VersionInfo>
```

https://issues.apache.org/jira/browse/JCLOUDS-743