Add new tests for 1.1

[MichaelClerx]

Valid

• 2.4.3.import_with_extensions
• 2.4.3.xlink_href_in_import
• 3.4.1.1.model_with_import
• 3.4.3.7 same but with 1 or 2 imported components
• 5.? Unit shadowing: Component overrides model unit
• 6.x connections to imported components (and interfaces etc.)
• 6.x unit conversion to imported components/units
• imported relationship
• 8.4.1_cmeta_id_in_import
• 8.4.1_cmeta_id_in_import_component
• 8.4.1_cmeta_id_in_import_units
• 8.4.1_cmeta_id_in imported elements (component, units, variables, connections?)
• 8.4.2_rdf_in_import
• 8.4.2_rdf_in_import_component
• 8.4.2_rdf_in_import_units
• duplicate_connections w imports
• overdefined w imports
• unit_checking_consistent w imports
• unit_checking_inconsistent w imports
• unit_conversion_convertible w imports

[MichaelClerx]

Valid, more complex import cases

• import an unrelated component
• import a component and use one of its variables
• import a unit
• import a unit and use it
• variable_with_initial_value_imported_var (reffed via in same comp)

[MichaelClerx]

Invalid

• 2.4.3.bad_cmeta_attribute_in_import
• 2.4.3.bad_rdf_element_in_import
• 2.4.3.cmeta_element_in_import
• 2.4.3.mathml_attribute_in_import
• 2.4.3.rdf_attribute_in_import
• 2.4.4.text_in_import
• 3.4.2.1.component_with_import (2 cases: in model & in import)
• 3.4.3.1.variable_with_import
• import_with_import
• units_with_import (2 cases: in model & in import)
• unit with import
• reaction with import
• variable_ref with import
• role with import
• math with import? Or general case "cellml in math"
• group_with_import
• relationship_ref_with_import
• component_ref_with_import (and nested?)
• 3.4.4.1_connection_with_import
• 3.4.5.1_map_components_with_import
• 3.4.6.1_map_variables_with_import
• 3.4.x some invalid interfaces, relationships etc. w imports
• 4.4.2 some invalid ci references w imports
• 4.4.3.2 some invalid cn units references w imports
• 5.4.1.1_units_with_import
• 5.4.1.2 duplicate names etc w imports
• 5.4.2.1_unit_with_import
• 5.4.2.2 unit cycle w imports
• 6.4.1.1_group_with_import
• 6.4.2.1_relationship_ref_with_import
• 6.4.2.5 relationship ref duplicate w imports?
• 6.4.3.1_component_ref_with_import
• 6.4.3.2_component_ref errors w imports
• 6.4.3.3_component_ref errors w imports
• 7.4.1.1_reaction_with_import
• 7.4.2.1_variable_ref_with_import
• 7.4.3.1_role_with_import
• 8.4.1 duplicate cmeta ids in imported elements

[MichaelClerx]

Sections

3.2.1/3.4.1 in model
3.2.2/3.4.2 in import
3.2.4 connection to imported variables
5.4.1 in import
5.4.2 units_ref rules
9 Importing models