slapproxy: Include sharedness in hateoas support

Currently hateoas support in proxy only lists non-shared instances,
so this always says that the instances are not shared.

slapos/proxy/views.py

@@ -1123,6 +1123,11 @@ def hateoas_partitions(partition_reference):
           'key': 'field_my_source_reference',
           'default': partition['software_type'],
         },
+        'my_root_slave': {
+          'type': 'IntegerField',
+          'key': 'field_my_root_slave',
+          'default': 0,
+        },
       },
     },
     '_links': {

slapos/tests/test_slapproxy.py

@@ -1299,6 +1299,7 @@ class TestCliInformation(CliMasterMixin):
       {
         "software-url": "http://sr0//",
         "software-type": "default",
+        "shared": False,
         "requested-state": "started",
         "instance-parameters": {},
         "connection-parameters": {},
@@ -1311,6 +1312,7 @@ class TestCliInformation(CliMasterMixin):
       {
         "software-url": "http://sr1//",
         "software-type": "MyType1",
+        "shared": False,
         "requested-state": "started",
         "instance-parameters": {"couscous": "hello"},
         "connection-parameters": {},