lisa.tests.base.RTATestBundle: Add rtapp_profile_kwargs ctor param
lisa.tests.base.RTATestBundle: Add rtapp_profile_kwargs ctor param

FEATURE

Allow forwarding custom keyword arguments to _get_rtapp_profile() when
it is called via the "rtapp_profile" property.

This allows _get_rtapp_profile() to depend not only on the platform info
but also on user-defined values.

ARM-software/lisa,ARM-software/lisa,ARM-software/lisa,ARM-software/lisa