Interface tests: tell what class is wrong.

Instead of just failing with no clue except that 0 is equal to 0...
[slaptool] Add getComputerPartitionList and getComputerPartitionInformation methods.
Revert "[slaptool] Add getComputerPartitionList and getComputerPartitionInformation methods."

This reverts commit 33d2a927e75fb4e6f6fd444ce55a209d639e2b44.
[slapos_hypermedia] Upgrade to new erp5_hal_json_style.

A few tests can be taken out of this BT to be put in erp5_hal_json_style.
[slapos_hypermedia] Add support for other types of users, like Computer Partition.
[slapos_hypermedia] Add Instance_getHateoasRelatedHostingSubscription.
slap: Add OpenOrder.getInformation() and OpenOrder.getOpenOrderList().
slapos CLI: add slapos list and slapos info.
[slapos_hypermedia] add hateoas URL preference.
[SlapTool] Add getHateoasUrl method.
slapos.slap: add getHateoasUrl support.
[slapos_erp5] testSlapOSERP5SkinSelection: add Hal skin.
[slapos.slap] Implement Partition.getInformation()
fixed call to initializeConnection
fixup hypermedia adapt Base_getHateoasMaster
[slapos_hypermedia] Change Base_getHateoasMaster about 'me' link.

So that it fits ERP5Document_getHateoas style.
slapos.core: Change Base_getHateoasMaster about 'me' link.
slapos.Core: remove hardcoded Base_getHateoasMaster link.

It is now provided by slaptool.
slapos.slap: Adapt HateoasNavigator to work with URNs.

Also cleanup and have a beginning of good basis to build a real navigator.
[slapos_hypermedia] Base_getHateoasMaster extends ERP5Document_getHateoas + all URNs return resource, not script.