add more TachyonURI unit tests
rename local variabl name in TachyonURITest:toStringTests()
unify expressions in TachyonURITest:constructFromParentAndChildTests
add more tests to TachyonURITest:getSchemeTests()
refactor TachyonURITest:compareToTests() to loop test
add more tests to TachyonURITest:equalsTests() and refactor to loop test
add '>' and '==' tests to TachyonURITest:compareToTests()
Merge pull request #267 from uronce-cc/TachyonURIUnitTest

TachyonURI unit tests