[Impala-CR](cdh5-2.2.0_5.4.x) This is a combination of 6 commits. Fixing 5.4.x branch jenkins job error. Using virtualenv's impala-python.

["Huaisi Xu (Code Review)" <ge...@cloudera.org>]

Huaisi Xu has posted comments on this change.

Change subject: This is a combination of 6 commits. Fixing 5.4.x branch jenkins job error. Using virtualenv's impala-python.
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Patch Set 2:

For cherry pick and unblock 54x test only. after decide to switch to virtualenv I will do another patch.

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Gerrit-MessageType: comment
Gerrit-Change-Id: Ie9d8f90c65921247dd885804165f9b7271ea807b
Gerrit-PatchSet: 2
Gerrit-Project: Impala
Gerrit-Branch: cdh5-2.2.0_5.4.x
Gerrit-Owner: Huaisi Xu <hx...@cloudera.com>
Gerrit-Reviewer: Anuj Phadke <ap...@cloudera.com>
Gerrit-Reviewer: Casey Ching <ca...@cloudera.com>
Gerrit-Reviewer: Huaisi Xu <hx...@cloudera.com>
Gerrit-Reviewer: Internal Jenkins
Gerrit-Reviewer: Juan Yu <jy...@cloudera.com>
Gerrit-HasComments: No