BTS_Tests[_VAMOS]: use default param values for ts_RSL_MultirateCfg

There is no real need to pass the multi-rate parameters explicitly
in each invocation of ts_RSL_MultirateCfg.  The exact multi-rate
configuration does not matter in scope of BTS specific tests.

Change-Id: I24117af8c5b7b11fe4b8f24fca5279ad97b46fab
2 files changed