Remove unneeded GET call while fetching logs.

The earlier implementation for getlog first makes a GET call to `commands/id` which returns the following:
```
.
"meta_data": {"results_resource": "commands/id/results", "logs_resource": "commands/id/logs"}
.
```
then it makes a GET call to `meta_data['logs_resource']` which seems to be always equal to `commands/id/logs`. So why not directly make a GET call to `commands/id/logs`.

Can there be a situation when `meta_data['logs_resource']` is not equal to `commands/id/logs`?

cc: @jsensarma, @vrajat, @guptarajat