branched gerrit 2.5.X

Change-Id: I31d21dc05bb381ac5eac1bcccaf03eb04964cf5e
differentiate branches for Buildbot Release 1.x and 2.Y

Change-Id: Ifa102974c03316fddee9f7e27e0071616903c276
delete pruged tasks from platform specific queue

Change-Id: I451a19ab6e1c5f04e06bc480561bab37de98ebb6
add unit test

Change-Id: I2515dfe3e4b428a1c5bf9754054c3e720f48ece0
different problems fixed

Change-Id: Idcb16d84ec831af6c3ce85559b538671f48babb5
add extern log file publication (jenkins)

Change-Id: Iee2fd112807a9c50ff55cde6b387e8934fe28c15
add test-log-channel ssh command

Change-Id: I59b86dc5459a2526134c9b9ea5b8db1d7c2278e7
make --id optionally

Change-Id: I12485ee7c7569d49f350cef67776ad9184916aef
handle stale patch sets

Change-Id: Ie15229b163a03968a0994e8585d42881e79fd897
Change platform names to: Windows, Linux, MacOSX

Change-Id: Iff7dcf48ac708bcb693837be98c869359a601f12
don't forge review identity, vote -1/+1, or none/+2

Change-Id: I9ddb6ebb9f57091477a7261cc649271e26e212e8