Bug 1679918

Initially reported in https://github.com/oVirt/ovirt-engine-sdk/issues/15 by cclauss

Quoting:
"""
Legacy **print** statements are syntax errors in Python 3 but **print()** function works as expected in both Python 2 and Python 3.

[flake8](http://flake8.pycqa.org) testing of https://github.com/oVirt/ovirt-engine-sdk on Python 3.7.1

$ **flake8 . --count --select=E901,E999,F821,F822,F823 --show-source --statistics**

```
./automation/build.py:155:68: F821 undefined name 'version'
        print("SDK version \"%s\" doesn't match format \"%s\"." % (version, version_re.pattern))
                                                                   ^
./sdk/setup.py:52:13: F821 undefined name 'VERSION'
    version=VERSION,
            ^
./sdk/examples/add_vm_snapshot.py:36:7: F821 undefined name 'logger'
  log=logger.getLogger(),
      ^
./sdk/examples/upload_disk_snapshots.py:137:23: E999 SyntaxError: invalid syntax
                print r.status, r.reason, "Completed", "{:.0%}".format(pos / float(size))
                      ^
./sdk/examples/attach_nfs_data_storage_domain.py:38:9: F821 undefined name 'logger'
    log=logger.getLogger(),
        ^
./sdk/examples/download_disk_snapshots.py:93:40: E999 SyntaxError: invalid syntax
    print "Downloading disk snapshot %s" % disk_snapshot.id
                                       ^
./sdk/examples/download_disk.py:131:35: F821 undefined name 'HttpException'
        except (EnvironmentError, HttpException):
                                  ^
2     E999 SyntaxError: invalid syntax
5     F821 undefined name 'version'
7
```
**E901,E999,F821,F822,F823** are the "_showstopper_" [flake8](http://flake8.pycqa.org) issues that can halt the runtime with a SyntaxError, NameError, etc. These 5 are different from most other flake8 issues which are merely "style violations" -- useful for readability but they do not effect runtime safety.

* F821: undefined name `name`
* F822: undefined name `name` in `__all__`
* F823: local variable name referenced before assignment
* E901: SyntaxError or IndentationError
* E999: SyntaxError -- failed to compile a file into an Abstract Syntax Tree


"""