Refactored suite_builder to be ready for context.

… no errors found)

…ent suite to child suite.

Added `ut_utils.gc_rollback_default` and `ut_suite_item.get_rollback_type` to return default when rollback not set explicitly.
Added support for `--%context`/`--%endcontext` annotations.
Refactored `ut_executable` and `ut_executable_test` to have suite-agnostic constructor.
Extended constructor for `ut_suite` to accept `a_name` separately from `a_object_name`.
Removed `ut_suite_item_base` - leftover from refactoring of listener model.
Significant changes to suite builder - added mechanism to display warnings for invalid annotations.
Removed mis-located old tests.

Moved/fixed some constants.

Fixed tests.

# Conflicts:
#	source/api/ut_runner.pkb
#	source/core/ut_utils.pks
#	source/reporters/ut_teamcity_reporter.tpb

Added additional tests for suite_builder.
Adjusted variable names to  match convention.
Fixed setting of nls_params for XMLTYPE conversion using DBMS_XMLGEN.

…attern, CLOB and escape char.

Pivoted matchers / types matrix.

Fixed issue with invalid object type passed to events `before_calling_test_execute` `after_calling_test_execute`
Fixed cutting of multi-line comments when parsing-annotations.
Annotation position now indicates line number of annotation in package.

… multibyte text in it.

Added additional info in format: `at "OWNER.PACKAGE[.PROCEDURE]", line x` to annotation warnings.

Added additional warnings.

Added additional warnings.

Reorganized order of sections in annotations documentation.

…_context

# Conflicts:
#	docs/userguide/annotations.md
#	source/api/ut_runner.pkb
#	source/core/types/ut_run.tps
#	source/core/ut_utils.pkb
#	source/core/ut_utils.pks
#	source/reporters/ut_xunit_reporter.tpb
#	test/install_tests.sql