docs: reflect latest Open CI sequence

A recent change removed one of the jobs, tf-a-parameterized-builder,
so reflect it in the sequence. Also, track the corresponding png file
generated by [1] for a human/easier view at the repository
tree. Also, rephrase most of the text with the aim of a shorter
and more concise plot.

[1] websequencediagrams.com

Signed-off-by: Leonardo Sandoval <leonardo.sandoval@linaro.org>
Change-Id: I787d94e8707be28c164906d93c8acaeb42816638
diff --git a/docs/open_jobs_seq.png b/docs/open_jobs_seq.png
new file mode 100644
index 0000000..d1e2a57
--- /dev/null
+++ b/docs/open_jobs_seq.png
Binary files differ
diff --git a/docs/open_jobs_seq.txt b/docs/open_jobs_seq.txt
index c1754f3..cd3fe48 100644
--- a/docs/open_jobs_seq.txt
+++ b/docs/open_jobs_seq.txt
@@ -1,23 +1,20 @@
 # This is to be pasted on to websequencediagrams.com to get the sequence
 # diagram of current CI setup
 
-title Trusted Firmware Open CI core jobs/scripts
+title Trusted Firmware A Open CI Flow
 
-actor gerrit reviewer
-participant tf-gerrit-tforg-l1
-gerrit reviewer->+tf-gerrit-tforg-l1: "Allow-CI" manual trigger from gerrit
-tf-gerrit-tforg-l1->+tf-ci-gateway: Pass TEST_GROUPS
-tf-ci-gateway->+tf-a-parameterized-builder: Split TEST_GROUPS into TEST_DESC
-tf-a-parameterized-builder->+tf-a-builder: Pass TEST_DESC
+
+participant trigger-job
+trigger-job->+tf-ci-gateway: TEST_GROUPS
+tf-ci-gateway->+tf-a-builder: TEST_DESC
 tf-a-builder->+builders.sh:
-builders.sh->+run_local_ci.sh: Prepare environment and launch build
-note over run_local_ci.sh: Build TEST_DESC
-note over run_local_ci.sh: Generate LAVA [Juno/FVP] YAML
-run_local_ci.sh->+builders.sh: complete
+builders.sh->+run_local_ci.sh:
+note over run_local_ci.sh: Build package
+note over run_local_ci.sh: Generate LAVA job
+run_local_ci.sh->+builders.sh:
 builders.sh->+tf-a-builder:
-tf-a-builder->+post-build-lava:
-post-build-lava->+LAVA: submit job
-note over LAVA: Juno/FVP Linux/TFTF boot and test
-LAVA->+post-build-lava: completes
-post-build-lava->+tf-a-builder:
-tf-a-builder->+tf-gerrit-tforg-l1:
+tf-a-builder->+LAVA: Submit LAVA job
+note over LAVA: Execute LAVA job
+LAVA->+tf-a-builder:
+tf-a-builder->+tf-ci-gateway:
+tf-ci-gateway->+trigger-job: