Verification Component Context missing axi_lite_master

[F2g-attocube]

Currently the vunit_lib.vc_context does not include the axi_lite_master_pkg, see: https://github.com/VUnit/vunit/blob/master/vunit/vhdl/verification_components/src/vc_context.vhd

It caused me quite some trouble to find this and include the package myself. For the sake of completeness I believe it should be included in the context.