Fixed test names, fixed broken element selection, viewport resize.

Test names now follow standard convention of prefix.testname.  Also
fixed a problem with the web visualizer can test where some element
name had changed in application and test could no longer find it.
Also now resize viewport explicitly in web tests so that different
broswers do not get different image sizes.

Change-Id: Icd1b27b5066875247e95054672116da9052e14af
Merge topic 'pvweb-integrate-test-packages-alternate' into next

b280128 Fixed test names, fixed broken element selection, viewport resize.