Fix various bugs in the new syncing script

Fix various bugs in the new syncing script
https://bugs.webkit.org/show_bug.cgi?id=156393

Reviewed by Darin Adler.

* server-tests/resources/common-operations.js: Added. This file was supposed to be added in r199191.
(addBuilderForReport):
(addSlaveForReport):
(connectToDatabaseInEveryTest):
(submitReport):
* tools/js/buildbot-triggerable.js:
(BuildbotTriggerable.prototype._pullBuildbotOnAllSyncers): Don't log every time we pull from buildbot
builder as this dramatically increases the amount of log we generate.
* tools/js/parse-arguments.js:
(parseArguments): Fixed a typo. This should be parseArgument*s*, not parseArgument.
* tools/js/remote.js:
(RemoteAPI.prototype.url): Fixed a bug that portSuffix wasn't being expanded in the template literal.
(RemoteAPI.prototype.configure): Added more validations with nice error messages.
(RemoteAPI.prototype.sendHttpRequest): Falling back to port 80 isn't right when scheme is https. Compute
the right port in configure instead based on the scheme.
* tools/sync-buildbot.js:
(syncLoop): Fixed the bug that syncing multiple times fail because Manifest.fetch() create new Platform
and Test objects. This results in various references in BuildRequest objects to get outdated. Fixing this
properly in Manifest.fetch() because we do need to "forget" about some tests and platforms in some cases.
For now, delete all v3 model objects and start over in each syncing cycle.
* unit-tests/tools-js-remote-tests.js: Added. Unit tests for the aforementioned changes to RemoteAPI.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@199220 268f45cc-cd09-0410-ab3c-d52691b4dbfc