MAGETWO-86454: [Backport for 2.1.x] Update copyright year

[olysenko]

Scope

Bug

• MAGETWO-86454 [Backport for 2.1.x] Update copyright year

Bamboo CI Builds

• M2, CI (CE + EE) - 2.1-develop - L1
• M2, CI (CE + EE) - 2.1-develop - L2
• M2, CI (CE + EE) - 2.1-develop - L3
• M2, CI (CE + EE) - 2.1-develop - PAT
• M2, CI (CE + EE) - 2.1-develop - Sample Data Tests
• Semantic Version Checker - 2.1-develop

Related Pull Requests

https://github.com/magento/magento2ce/pull/2010
https://github.com/magento/magento2ee/pull/857
https://github.com/magento/magento2-infrastructure/pull/488
https://github.com/magento/magento2-sample-data-ee/pull/25

Checklist

• PR is green on M2 Quality Portal
• Jira issues have accurate summary, meaningful description and have links to relevant documentation at the story/task level
• Semantic Version build failure is approved by architect (if build is red)
• Pull Request approved by architect
• Pull Request quality review performed by
• All unstable functional acceptance tests are isolated (if any)
• All linked Zephyr tests are approved by PO and have Ready to Use status
• Travis CI build is green (for mainline CE only)
• Jenkins Extended FAT build is green

[magento-cicd2]

All committers have signed the CLA.