test: properly escape newlines within for loop.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
test: see if speed capabilities changes are applied.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
test: output modified interface name.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
dabba: do not return an error on unspecified speed.

The user might just want to change the interface port capability.
In this case, no speed settings are given and the message must reflect
that.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
test: stop all dabbad instances before unit tests.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
test: refactor interface pause output length check.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
test: get the number of interfaces from the output.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
test: check interface capabilities output length.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
test: check interface pause settings against ethtool.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>