Python 3.4 deprecation

[joachimmetz]

When running tests with tox:

Python 3.4 support has been deprecated. pip 19.1 will be the last one supporting it.
Please upgrade your Python as Python 3.4 won't be maintained after March 2019 

• [x] remove 2.7 and 3.4 (https://github.com/log2timeline/l2tdevtools/pull/766) from test templates
• [x] update projects
  • dfdatetime https://github.com/log2timeline/dfdatetime/pull/148
  • dfwinreg https://github.com/log2timeline/dfwinreg/pull/134
  • dfvfs https://github.com/log2timeline/dfvfs/pull/417
  • plaso https://github.com/log2timeline/plaso/pull/2797
  • dtfabric
  • dtformats
  • esedb-kb
  • winevt-kb
  • winreg-kb
  • vstools
  • artifacts
  • dfvfs-snippets https://github.com/open-source-dfir/dfvfs-snippets/pull/12
  • l2tbinaries tests
  • l2tdevtools
  • https://github.com/log2timeline/l2tdevtools/commit/ab033eb8dfde102d529855e272810a5c003614b8
  • https://github.com/log2timeline/l2tdevtools/pull/775
  • https://github.com/log2timeline/l2tdevtools/pull/776
  • https://github.com/log2timeline/l2tdevtools/pull/777
  • update rpm/srpm build targets https://github.com/log2timeline/l2tdevtools/pull/778
  • update dpkg/dpkg-source build targets https://github.com/log2timeline/l2tdevtools/pull/781
  • update osc build target

Also remove Python 2.7 (https://github.com/log2timeline/l2tdevtools/issues/607)

• remove from GIFT PPA (testing, dev, stable)
  • remove ipaddress as a dependency
• remove from GIFT COPR (testing, dev, stable)
• remove from l2tbinaries

https://travis-ci.com/log2timeline/l2tbinaries/jobs/278203810#L690

The following packages have unmet dependencies:
 python3-timesketch : Depends: python3-ipaddress (>= 1.0.22) but it is not installable

[joachimmetz]

• timesketch has been addressed
• check if future can/should be removed as well

[joachimmetz]

Most projects updated and python 2 only dependencies removed.