obis: checking that session belongs to the correct user; refactored integration tests

src/python/OBis/integration_tests/00_get_commit_hash.sh

src/python/OBis/integration_tests/00_get_config.sh

src/python/OBis/integration_tests/00_get_config_global.sh

src/python/OBis/integration_tests/01_global_config.sh

.../integration_tests/02_first_commit_1_create_repository.sh

...python/OBis/integration_tests/02_first_commit_2_commit.sh

...ython/OBis/integration_tests/03_second_commit_1_commit.sh

...is/integration_tests/03_second_commit_2_git_annex_info.sh

src/python/OBis/integration_tests/04_second_repository.sh

src/python/OBis/integration_tests/05_second_external_dms.sh

...Bis/integration_tests/06_error_on_first_commit_1_error.sh

...is/integration_tests/06_error_on_first_commit_2_status.sh

...is/integration_tests/06_error_on_first_commit_3_commit.sh

src/python/OBis/integration_tests/07_attach_to_collection.sh

src/python/OBis/integration_tests/08_addref_1_success.sh

src/python/OBis/integration_tests/08_addref_2_duplicate.sh

...python/OBis/integration_tests/08_addref_3_non-existent.sh

src/python/OBis/integration_tests/09_local_clone.sh

...hon/OBis/integration_tests/11_init_analysis_1_external.sh

...hon/OBis/integration_tests/11_init_analysis_2_internal.sh