Add SerialConsole to Manager node

This commit adds SerialConsole property to the
response JSON when doing a GET on the manager resource.
The supported connection types are hard-coded.

Tested:
Performed a GET on the manager object to see the newly added
properties:

curl -k -H "X-Auth-Token: $bmc_token" -X GET
https://${bmc}:${port}/redfish/v1/Managers/bmc
{
  "@odata.context": "/redfish/v1/$metadata#Manager.Manager",
  "@odata.id": "/redfish/v1/Managers/bmc",
  "@odata.type": "#Manager.v1_3_0.Manager",
....
....
  "SerialConsole": {
    "ConnectTypesSupported": [
      "IPMI",
      "SSH"
    ],
    "ServiceEnabled": "true"
  },
....
....
}

Ran Redfish service validator and ensured no new errors. The newly
added properties PASS validation. Snippet of the verbose output
from the validator:
....
....
Manager.v1_0_0.Manager:SerialConsole
        value: OrderedDict([('ConnectTypesSupported', ['IPMI', 'SSH']),
('ServiceEnabled', True)]) <class 'collections.OrderedDict'>
        has Type: Manager.v1_0_0.SerialConsole complex
        is Optional
        ***going into Complex
Manager.v1_0_0.SerialConsole:ConnectTypesSupported
        value: ['IPMI', 'SSH'] <class 'list'>
        has Type: Collection(Manager.v1_0_0.SerialConnectTypesSupported) enum
        is Optional
        permission OData.Permission/Read
        is Collection
        Success
        Success
Manager.v1_0_0.ManagerService:ServiceEnabled
        value: True <class 'bool'>
        has Type: Edm.Boolean Edm.Boolean
        is Optional
        permission OData.Permission/ReadWrite
        Success
Manager.v1_0_0.ManagerService:MaxConcurrentSessions
        value: n/a <class 'str'>
        has Type: Edm.Int64 Edm.Int64
        is Optional
        prop Does not exist, skip...
        ***out of Complex
....
....

Change-Id: I659501d5537bfb3eedc8cd2204be98fee742324d
Signed-off-by: Santosh Puranik <santosh.puranik@in.ibm.com>
diff --git a/redfish-core/lib/managers.hpp b/redfish-core/lib/managers.hpp
index e6e80a8..c73a218 100644
--- a/redfish-core/lib/managers.hpp
+++ b/redfish-core/lib/managers.hpp
@@ -972,6 +972,16 @@
             "GracefulRestart"};
 
         res.jsonValue["DateTime"] = crow::utility::dateTimeNow();
+
+        // Fill in GraphicalConsole and SerialConsole info
+        res.jsonValue["SerialConsole"]["ServiceEnabled"] = true;
+        res.jsonValue["SerialConsole"]["ConnectTypesSupported"] = {"IPMI",
+                                                                   "SSH"};
+        // TODO (Santosh) : Uncomment when KVM support is in.
+        // res.jsonValue["GraphicalConsole"]["ServiceEnabled"] = true;
+        // res.jsonValue["GraphicalConsole"]["ConnectTypesSupported"] =
+        //    {"KVMIP"};
+
         res.jsonValue["Links"]["ManagerForServers@odata.count"] = 1;
         res.jsonValue["Links"]["ManagerForServers"] = {
             {{"@odata.id", "/redfish/v1/Systems/system"}}};