function get_asic() returns wrong object

[AntonHryshchuk]

Description

In commit b38562a
Was changed returned object in function get_asic().
From SonicAsic, which contained method get_docker_cmd().
To SonicHost, which don't have method get_docker_cmd().

As a result, test test_xcvr_info_in_db.py failed with error message:

platform_tests/test_xcvr_info_in_db.py:36:

---

common/platform/transceiver_utils.py:137: in check_transceiver_status
check_transceiver_basic(dut, asic_index, interfaces, xcvr_skip_list)
common/platform/transceiver_utils.py:66: in check_transceiver_basic
docker_cmd = asichost.get_docker_cmd(cmd, "database")

---

self = <tests.common.devices.SonicHost object at 0x7f8a23805550>, module_name = 'get_docker_cmd'

def __getattr__(self, module_name):
    if self.host.has_module(module_name):
        self.module_name = module_name
        self.module = getattr(self.host, module_name)

        return self._run
    raise AttributeError(

      "'%s' object has no attribute '%s'" % (self.__class__, module_name)

        )

E AttributeError: '<class 'tests.common.devices.SonicHost'>' object has no attribute 'get_docker_cmd'

Steps to reproduce the issue:

1. run the platform_tests/test_xcvr_info_in_db.py

[liat-grozovik]

@abdosi and @yaxia please note recent degradation.
if the fix provided in commit is approved the tests which assumed to be working should be fixed as well.

[abdosi]

Let me check on this.

[vcheketx]

@abdosi This issue also occurs during platform_tests/test_sequential_restart.py::test_restart_swss:
E AttributeError: '<class 'tests.common.devices.SonicHost'>' object has no attribute 'get_service_name'
Could you take a look at this and update your fix for 'get_service_name' also?