Added port module parameters instead of fixed values for ALG test cases.

Pulled up functions to AtsCommon.

Set real values for Ipv4Address PIXITs

Implement some TODOs,
Remove TODOs in PIXITs
Minor bugs fixed

- Merging of different component types
- Mapping of components name to role within test configuration
- deep review of DS-Lite and 464XLAT test suites

Aligned naming of test cases.
Minor changes.

Added initial version of TC_464XLAT_PLATLSN_AW_BV_001, TC_464XLAT_PLATLSN_AW_BV_002, TC_464XLAT_PLATLSN_AW_BV_003.

TC_464XLAT_PLAT_LSN_ALG_BV_003,
TC_464XLAT_PLAT_LSN_ALG_BV_004,
TC_464XLAT_PLAT_LSN_ALG_BV_005.