quic: update config values for large stream tests
quic: update config values for large stream tests

- Update vpp and vpp_echo parameters to enable
  large data stream tests to pass.
- Standardize stream size nomenclature.

Type: fix

Change-Id: I929ac9f43ecfccf2c3c3fe4d076761154512fac5
Signed-off-by: Dave Wallace <0ed937c0e4b2f09f7bc24acf16cee52b8a199d5f@gmail.com>

FDio/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,chrisy/vpp