Add further unit tests for FVPs overlay usage

FVP deploy method calls ApplyOverlayImage with a root_partition
parameter. Check this propagates through correctly.

Change-Id: I9c908197d276f84dd7fc5b519b0c07616e2a1723
Signed-off-by: Dean Birch <dean.birch@arm.com>
15 jobs for fvp_support in 15 minutes and 45 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #86401
amd64
dispatcher-debian-10

00:02:33

passed #86403
amd64
dispatcher-debian-11

00:02:59

passed #86402
amd64
server-debian-10

00:02:51

passed #86404
amd64
server-debian-11

00:04:57

 
  Analyze
passed #86406
amd64
black

00:00:33

passed #86407
amd64
code_quality

00:00:22

passed #86408
amd64
coverage

00:06:02

57.63%
passed #86409
amd64
dockerfiles

00:00:20

passed #86410
amd64
job-schema

00:00:27

passed #86411
amd64
pylint

00:01:46

passed #86405
amd64-dind allowed to fail
sast

00:02:21

 
  Build
passed #86413
amd64
debian/10

00:01:23

passed #86412
amd64
doc

00:00:41

passed #86414
amd64-dind
docker-amd64-dispatcher

00:04:26

passed #86415
amd64-dind
docker-amd64-server

00:04:45