Python3 syntax error cleanup

[davidlange6]

remove fwk use of atoi (obsolete since python2.0 apparently..)
update more print statements
replace iteritems with six.iteritems

(all things identified by unit test errors in DEVEL build)

[cmsbuild]

The code-checks are being triggered in jenkins.

[cmsbuild]

The code-checks are being triggered in jenkins.

[cmsbuild]

+code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-26434/9220

• This PR adds an extra 28KB to repository

[cmsbuild]

A new Pull Request was created by @davidlange6 (David Lange) for master.

It involves the following packages:

CalibTracker/SiStripESProducers
IOPool/Input
RecoEgamma/ElectronIdentification
RecoEgamma/PhotonIdentification
RecoTauTag/RecoTau

@perrotta, @smuzaffar, @Dr15Jones, @christopheralanwest, @tocheng, @cmsbuild, @franzoni, @slava77, @pohsun can you please review it and eventually sign? Thanks.
@echabert, @Sam-Harper, @makortel, @jainshilpi, @pieterdavid, @gbenelli, @tocheng, @lgray, @wddgit, @mmusich, @varuns23 this is something you requested to watch as well.
@davidlange6, @slava77, @fabiocos you are the release manager for this.

cms-bot commands are listed here

[davidlange6]

please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/34140/console Started: 2019/04/11 09:32

[cmsbuild]

+1
Tested at: 9fc8dfd
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-26434/34140/summary.html

[cmsbuild]

Comparison job queued.

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-26434/34140/summary.html

Comparison Summary:

• No significant changes to the logs found
• Reco comparison results: 4 differences found in the comparisons
• DQMHistoTests: Total files compared: 32
• DQMHistoTests: Total histograms compared: 3140495
• DQMHistoTests: Total failures: 1
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3140297
• DQMHistoTests: Total skipped: 197
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 31 files compared)
• Checked 133 log files, 14 edm output root files, 32 DQM output files

[perrotta]

+1

• Technical
• Jenkins tests pass

[Dr15Jones]

+1

[pohsun]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next master IBs (tests are also fine). This pull request will now be reviewed by the release team before it's merged. @davidlange6, @slava77, @smuzaffar, @fabiocos (and backports should be raised in the release meeting by the corresponding L2)

[fabiocos]

+1