##### SUMMARY
Some of the modules still return something in `ansible_facts`, even though the result in there is an empty list:
 - ~~`azure_rm_publicipaddress_info`~~
 - ~~`azure_rm_networkinterface_info`~~
 - `azure_rm_storageaccount_info`
 - `azure_rm_virtualmachineimage_info`
 - `azure_rm_virtualmachinescaleset_info`
 - `azure_rm_virtualnetwork_info`

Finally, `azure_rm_resourcegroup_info` always returns `ansible_facts` with content (which is also returned as non-`ansible_facts`).

When called as `_info` modules, these modules should not have anything in `ansible_facts` when returning.

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
~~azure_rm_publicipaddress_info~~
~~azure_rm_networkinterface_info~~
azure_rm_resourcegroup_info
azure_rm_storageaccount_info
azure_rm_virtualmachineimage_info
azure_rm_virtualmachinescaleset_info
azure_rm_virtualnetwork_info

##### ANSIBLE VERSION
```paste below
2.9
```

class AzureRMVirtualMachineScaleSetInfo(AzureRMModuleBase):
    """Utility class to get virtual machine scale set facts"""
    def __init__(self):
        self.module_args = dict(
            name=dict(type='str'),
            resource_group=dict(type='str'),
            tags=dict(type='list'),
            format=dict(
                type='str',
                choices=['curated',
                         'raw'],
                default='raw'
            )
        )
        self.results = dict(
            changed=False,
            ansible_facts=dict(
                azure_vmss=[]
            )
        )
        self.name = None
        self.resource_group = None
        self.format = None
        self.tags = None
        super(AzureRMVirtualMachineScaleSetInfo, self).__init__(
            derived_arg_spec=self.module_args,
            supports_tags=False,
            facts_module=True
        )
    def exec_module(self, **kwargs):