schemas: Descriptions must be strings

```
$ python3 -c 'import json; import jsonschema; schema = json.load(open("schemas/global.json")); cls = jsonschema.validators.validator_for(schema); cls.check_schema(schema)'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib/python3/dist-packages/jsonschema/validators.py", line 204, in check_schema
    raise exceptions.SchemaError.create_from(error)
jsonschema.exceptions.SchemaError: ['The schema for an entity manager configuration file.  An entity ', 'mananger configuration file can consist of a single object, or an ', 'array of objects.  Objects must be of type EMConfig.'] is not of type 'string'

Failed validating 'type' in metaschema['properties']['description']:
    {'type': 'string'}

On schema['description']:
    ['The schema for an entity manager configuration file.  An entity ',
     'mananger configuration file can consist of a single object, or an ',
     'array of objects.  Objects must be of type EMConfig.']
```

Change-Id: I2b8102e7d6047c8a7e624e182465065268fb8ad9
Signed-off-by: Andrew Jeffery <andrew@codeconstruct.com.au>
diff --git a/schemas/satellite_controller.json b/schemas/satellite_controller.json
index 8f364bf..3a6c4af 100644
--- a/schemas/satellite_controller.json
+++ b/schemas/satellite_controller.json
@@ -3,33 +3,27 @@
     "definitions": {
         "SatelliteController": {
             "title": "satellite controller configuration",
-            "description": [
-                "The configuration used to add remote BMCs to a system"
-            ],
+            "description": "The configuration used to add remote BMCs to a system",
             "type": "object",
             "properties": {
                 "Hostname": {
-                    "description": ["Hostname or IP of satellite controller"],
+                    "description": "Hostname or IP of satellite controller",
                     "type": "string"
                 },
                 "Port": {
-                    "description": [
-                        "Network port to connect to satellite controller"
-                    ],
+                    "description": "Network port to connect to satellite controller",
                     "type": "number"
                 },
                 "AuthType": {
-                    "description": [
-                        "Type of authorization to use with satellite controller"
-                    ],
+                    "description": "Type of authorization to use with satellite controller",
                     "enum": ["None"]
                 },
                 "Name": {
-                    "description": ["The name of the object"],
+                    "description": "The name of the object",
                     "type": "string"
                 },
                 "Type": {
-                    "description": ["The type of satellite controller"],
+                    "description": "The type of satellite controller",
                     "enum": ["SatelliteController"]
                 }
             },