Revert getComputerConnectionParameterList implementation

  Revert the implementation for now as it still not decided
  if we want this as part of the API or not.

Revert "Fix commit on getComputerConnectionParameterList"

This reverts commit 9d25d12bacf2fc1f4cfe2b81b84bc059baf3bb60.

Revert "Delete Computer_getConnectionParameterList from slapos_cloud"

This reverts commit 75c5217fd4328dd5d24ded20dc7965ce357ce4cf.

Revert "Add unit test for getComputerConnectionParameterList"

This reverts commit 4691a18b6dccf533316ec97272854bd0ba442b03.

Revert "Computer: Get connection parameters for aggregated hosting subscriptions"

This reverts commit 995bea7ac2d92a18a65a338a3ac924bdf4c46754.

Revert "Hosting Subscription: Add aggregate base category"

This reverts commit b3e8a8abc2f416090cb8982a7d66509e9e60101f.

Revert "Computer request software instance workflow"

This reverts commit 1350e5742923fb9dc8839e1d8d77fa1138a07c00.
slapos.collect: Compress historical logs and fix folder permissions.
slapos.core: version up (1.2.2)
Add comments to proxy schema.
slapproxy: Quick refactor of request to be able to introduce multimaster support more easily.

Note: To finish the refactor, a lot of work is still needed, but not mandatory for multimaster feature.
Add multimaster support to slapproxy.
slapos.core: version up (1.2.3)
slapos.proxy: add multimaster configuration in example configuration file.
slapos: add support for cliff 1.7.0.
slapos.proxy: tests: do not wait for fixed time for external proxy to be started.

Also remove trailing whitespaces.
slapos.proxy: tests: remove useless supply.
slapos: cleanup cliff import.
slapgrid: do NOT raise in case of servererror when calling /softwareAvailable.

Mostly informational, it is more improtant to have a functional slapgrid.
Also: remove trailing spaces.
slapproxy tests: start external proxy using local ipv4 if provided in env.
slapproxy test: use current running code to start external proxy.
slapgrid: mandatory parameters can NOT be empty.
slap test: make sure mocks/stubs are NOT leaking.
Fill changelog.
fixup! slapproxy test: use current running code to start external proxy.
slapos.core: version up (1.2.3.1)