merge various l1 boot tests in same l2 boot tests

Following l1 groups has been removed so far
- tf-l1-boot-tests-cortex
- tf-l1-boot-tests-gicv2
- tf-l1-boot-tests-aarch32
- tf-l1-boot-tests-bl2_el3
- tf-l1-boot-tests-juno
- tf-l1-boot-tests-misc

Signed-off-by: Manish Pandey <manish.pandey2@arm.com>
Change-Id: I40931cf3e991d4643955cfbc944aca0593ca14de
6 files changed