test script update
now can use
- gradle testAll  ==> all test cases
- gradle testAllButLong (exclude test classes starting with LongRunning)
- gradle testAllButLongCrypto (idem with crypto enabled through jvm arg)
- gradle testScenario (only include test classes ending with ScenarioTest)
removing test suites
update TestConfigUtil to read jvm arg for crypto
rename classes with ScenarioTest in name
- « gradle test » runs all tests but the long running
- « gradle testAll » runs all
max parallel number = 2

group = "verification" added
description = " ... " added
Merge branch 'fix-test' of https://github.com/vwiencek/syncany
Fix typos, merge Vincent's 'gradle test' configs/code; closes #37