Squish is required by RTA for testing.

Task-number: QTQAINFRA-1523
Change-Id: I0c3653565f19cc9b798a0b63325c47b017cf5537
Reviewed-by: Joni Jäntti <joni.jantti@qt.io>
Reviewed-by: Matti Paaso <matti.paaso@qt.io>

This change will split common folder to four different folders:
Linux, Unix, Windows and MacOS. Each of these folders includes scripts
which are common for their operating system familes

Task-number: QTQAINFRA-1451
Change-Id: Ic93b2183052335dee875d1452b21e38d268b6474
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@qt.io>

Changed the helper function for extracting 7z files so that it also
supports the new C:\Utils\sevenzip location.

Change-Id: I4f2dafc4ccac71e2cd8a3c8148df4888f800484f
Reviewed-by: Tony Sarajärvi <tony.sarajarvi@qt.io>

Change-Id: I74abdcc2e7d2dccf4f85cd64fe5fb4b56e54d613
Reviewed-by: Heikki Halmet <heikki.halmet@qt.io>

This function was broken and only added the latest addition to the
actual PATH.

Change-Id: Ida352c7b605c1b9748bb98e4f51ce68a765c3ce3
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

Replaces existing Windows 8 x86 builds with
a vanilla tier 1 image that gets all needed
software provisioned except for VS2013 that is
pre-installed.
Also modifies existing provisioning scripts
under common to support this 32bit OS.

Task-number: QTQAINFRA-1383
Change-Id: I495cb2d78b4d2d8b2abb9af1254fff0a78a570d9
Reviewed-by: Heikki Halmet <heikki.halmet@qt.io>

Similar to the mysql change (parent commit) it's faster to rename any
older artifacts and install only what we need. This also generalizes the
zip archive extraction code for "dev" packages.

Change-Id: I3ad1f23efaed80fab3e0778a3e8c46317138f1ad
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@qt.io>

Change-Id: Ice10e54137da8a0d2372019a195a63121fd00a8a
Reviewed-by: Tony Sarajärvi <tony.sarajarvi@qt.io>

Installs Python version 2.7.10.
Python is required for building Qt 5 from source. More
specifically qtdeclarative and qtwebkit require it.

Change-Id: I63c8f3294a8a4799df5e52fbd41a36db8686950e
Reviewed-by: Jani Heikkinen <jani.heikkinen@qt.io>

QtWebKit requires newer Ruby than version installed on Windows 10 builders.

Task-number: QTQAINFRA-997
Change-Id: Id4f917a824daaab4aeb1445a3a16906663208b6d
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

Change-Id: I5cf59322f5a34cffe9fe8668755800bccb8cc13a
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@qt.io>

Change-Id: I3f12aa0dd54f99fafdffb53796e54e7b127c3c8c
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@theqtcompany.com>