Update test user guide to improve usability

Update test user guide to improve usability

- Modify hosts.yaml syntax to match patch by Serena
- Modify result file references for new timestamp patch by Georg
- Revise online/offline diagrams for OVP name change
- Add XCF GIMP source files for diagrams with layers for new elements

- New changes for cvp.0.9.0 to ovp.1.0.0
- Remove reference to bottlenecks container for now
- Modify section/heading structure
- Incorporate comments: results.json vs. result files
- Incorporate comments: online/offline install headings
- Incorporate comments: remove IP from launch_db.sh
- Incorporate comments: remove sudo for wget
- Incorporate comments: pod.yaml for SUT HW info
- Incorporate comments: test case to config file requirement
- Incorporate comments: suggested changes to env_config.sh

- Modify the sequence of the guide to reflect installation steps
- Outline all required configuration files earlier in the guide
- Highlight configuration file key entries and pitfalls
- Improve requirements for pod.yaml file for HA
- Improve online/offline install instructions
- Call out Dovetail docker run command and explain options
- Clarify when testapi and local db ports need to be changed
- Explain the dovetail run --testsuite and --testarea arguments
more clearly
- Improve --report option and default result result behavior
- Make CVP portal a separate section
- Explain CVP portal workflow to reflect current state of interface
- Update references to cvp.0.8.0 with cvp.0.9.0

Change-Id: I41857c1b07c211a95f19c99054ca414351c75c20
Signed-off-by: Eddie Arrage <eddie.arrage@huawei.com>