Change in ovirt-engine-sdk[sdk_4.1]: Raise SDK error for unknown tags

[Code Review]

>From Ondra Machacek <omachace at redhat.com>:

Ondra Machacek has submitted this change and it was merged.

Change subject: Raise SDK error for unknown tags
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Raise SDK error for unknown tags

Currently when the SDK tries to read a document that contains an
unknonwn tag, for example, a document that is actually HTML, it
generates a 'KeyError' because it tries to access a dictionary that
doesn't contain that tag as key. In this situation the SDK should
instead generate a SDK error explaining that there is no reader for that
tag.  But that doesn't happen because we are accessing the dictionary
with the '[]' operator, which generates the 'KeyError' when the key
doesn't exist. To avoid that this patch changes the SDK so that it uses
the 'get' method instead, and so that it raises an SDK error instead of
an 'Exception'.

Change-Id: Ifebb1d5d71dfdb3ccccae9ae0596d9fadc5ed1b9
Signed-off-by: Juan Hernandez <juan.hernandez at redhat.com>
(cherry picked from commit 4a7fe15baaaaa80bcc48872b040c22913202ac75)
---
M sdk/lib/ovirtsdk4/reader.py
M sdk/tests/test_reader.py
2 files changed, 17 insertions(+), 2 deletions(-)

Approvals:
  Ondra Machacek: Verified; Looks good to me, approved
  Jenkins CI: Passed CI tests



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Gerrit-MessageType: merged
Gerrit-Change-Id: Ifebb1d5d71dfdb3ccccae9ae0596d9fadc5ed1b9
Gerrit-PatchSet: 1
Gerrit-Project: ovirt-engine-sdk
Gerrit-Branch: sdk_4.1
Gerrit-Owner: Ondra Machacek <omachace at redhat.com>
Gerrit-Reviewer: Jenkins CI
Gerrit-Reviewer: Juan Hernandez <juan.hernandez at redhat.com>
Gerrit-Reviewer: Ondra Machacek <omachace at redhat.com>
Gerrit-Reviewer: gerrit-hooks <automation at ovirt.org>