chore(travis): more updates to scripts.

* update travis-run-script
  * add default browsers (Chrome, Firefox) unless overridden by env variables
  * enable travis error tracing
* updates to source-browsers.json
  * set SL_FIREFOX to latest version
  * update SL_IE11 to version 11.103
  * add BS_Safari10 entry
* update travis.yml
  * add ng-version 1.5 and saucelabs_required

Author: ThomasBurleson

.travis.yml

@@ -15,7 +15,9 @@ env:
   - secure: X7CNmOMemAJ9Jqrsmv6MXyeh8n8TIL5CKzE9LYsZUbsyKo0l5CyyysJq0y/AbpQS6awsSv2qP/cZ/kand6r6z0wMFbUcxa4HjMZEfRwv3sGtwj1OKJko/GvjcZQzD54FtHy1NU7wR0mYhAlE5IwH7f8bMa/nUiijgD/TOCTtKH8=
   matrix:
     - NG_VERSION=1.5
+    - NG_VERSION=1.6
     - NG_VERSION=snapshot
+    - MODE=saucelabs_required
 
 matrix:
   fast_finish: true

config/sauce-browsers.json

@@ -18,8 +18,7 @@
   "SL_FIREFOX": {
     "base": "SauceLabs",
     "browserName": "firefox",
-    "platform": "Windows 10",
-    "version": "latest-1"
+    "version": "latest"
   },
   "SL_FIREFOXBETA": {
     "base": "SauceLabs",
@@ -83,7 +82,7 @@
     "base": "SauceLabs",
     "browserName": "internet explorer",
     "platform": "Windows 10",
-    "version": "11"
+    "version": "11.103"
   },
   "SL_EDGE": {
     "base": "SauceLabs",
@@ -151,6 +150,12 @@
     "os": "OS X",
     "os_version": "El Capitan"
   },
+  "BS_SAFARI10": {
+      "base": "BrowserStack",
+      "browser": "safari",
+      "os": "OS X",
+      "os_version": "Sierra"
+    },
   "BS_IOS7": {
     "base": "BrowserStack",
     "device": "iPhone 5S",

scripts/travis-run-script.sh

@@ -1,11 +1,17 @@
 #!/bin/bash
 
-# Terminate the execution if anything fails in the pipeline.
-set -e
+# Enable tracing and Terminate the execution if anything fails in the pipeline.
+set -xe
 
 # Ensure that scripts will run from project dir.
 cd $(dirname $0)/..
 
+# This is the default set of browsers to use on the CI server unless overridden via env variable
+if [[ -z "$BROWSERS" ]]
+then
+  BROWSERS="Chrome,Firefox"
+fi
+
 # When Travis CI specifies an Angular version, try to install those for tests.
 if [[ -n "$NG_VERSION" ]]; then
   ./scripts/fetch-angular-version.sh "$NG_VERSION"
@@ -24,4 +30,4 @@ gulp build
 gulp karma --config=config/karma-sauce.conf.js --browsers=$BROWSER --reporters='dots'
 
 # Shutdown the tunnel
-./scripts/sauce/stop-tunnel.sh
+./scripts/sauce/stop-tunnel.sh