Drop the redundant code in maintenace

[Tao Li]

Brief Description
-----------------
The hostname = obj_ptr->get_host(uuid) statement in mtcHttpSvr.cpp has been executed once, so we needn't execute it again.

Severity
--------
minor

Steps to Reproduce
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Expected Behavior
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Actual Behavior
----------------

Reproducibility
---------------

System Configuration
--------------------
STD system

Branch/Pull Time/Commit
-----------------------
2019-10-04_09

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/648897
Committed: https://git.openstack.org/cgit/openstack/stx-metal/commit/?id=0e4bf56f3c04e32949ef51258e6a0315b507edb5
Submitter: Zuul
Branch: master

commit 0e4bf56f3c04e32949ef51258e6a0315b507edb5
Author: Tao Li <[e-mail]>
Date: Mon Apr 1 11:23:03 2019 +0800

    Drop the redundant code

    The get_host operation is redundant and should be dropped.

    Closes-Bug: #1823826
    Signed-off-by: Tao Li <[e-mail]>

    Change-Id: I62d436092ead426122b2cce680ba9aa398b8e80e

[Ghada Khalil (gkhalil)]

Adding the stx.2.0 release label as the fix was merged for that release