Updates test results in test link.

Uses ini file with test case external id and test node id as mapping

xmlrpc_url =http://[test link server]/testlink/lib/api/xmlrpc.php
api_key =Testlink->My Settings->API interface->Generate Key
project =Project name as in test link
test_plan =Prefix $ to pick from environment variable.
build_name =Prefix $ to pick from environment variable.

##pytest.ini configuration testlink_ini_file=testlink.ini

###Testlink file format (testlink.ini) ; ini file with testlink-conf section [testlink-conf] xmlrpc_url=http://[test link server]/testlink/lib/api/xmlrpc.php') api_key=aaaabbbbccccddddaaaabbbbccccdddd project=py-tl-Project test_plan=py-tl-Plan build_name=py-tl-Build exit_on_fail=optional [False] True errors on testlink failures'

;tl_custom_field=[pytest_node]unique custom_field')
new_build=optional [False] True creates a new build')    
;tl_reference_test_plan=Test plan with all tests added.')

; ini file with testlink-maps section
[testlink-maps]
;test case external-id=node-id(after parametrization)
test-0=test_pytest_testlink.py::TestClass::test_dummy
test-1=test_pytest_testlink.py::test_pass[0]
test-2=test_pytest_testlink.py::test_pass[1]
test-3=test_pytest_testlink.py::test_pass[2]

####Todo: --platform -> add platform option to config/ini files

--strict -> fail if missing mapping between test link and nodes

--find-matching-tests -> lists tests with proper mapping

--find-tests-with-no-mapping -> lists tests with no mapping

-- query all builds and sort

-- create a new build if required - auto increment

###Changes:

0.3 2/20/2015 - Support for 1.9.3