MAGECLOUD-3246: Add --use-rewrites option to install command, MAGECLOUD-2895: The var/log/install_upgrade.log is useless without dividers and timestamps

[BaDos]

Description

• MAGECLOUD-3246: Added --use-rewrites option to install command
• MAGECLOUD-2895: Added timestamps to the var/log/install_upgrade.log during upgrade/install of Magento

Fixed Issues (if relevant)

1. https://magento2.atlassian.net/browse/MAGECLOUD-3246
2. https://magento2.atlassian.net/browse/MAGECLOUD-2895

Manual testing scenarios

1. Check that the file var/log/install_upgrade.log contains the installation date and the upgrading date.
2. Check that after a new installation of Magento the admin URL does not contain index.php

Contribution checklist

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)

[andriyShevtsov]

QA Passed

P.S. I propose to add names of both tasks into Title of PR

[ghost]

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