Merge pull request #1433 from Azure/dev

Dev
updating version number and ChangeLog.txt
Merge branch 'release-0.8.12' of github.com:Azure/azure-sdk-tools-xplat into release-0.8.12
skipping storage file tests fail in Travis CI node version 0.8 on time out issues
hot fix for hdinsight commands
jshint fixes
Merge pull request #1446 from amarzavery/hdinsightfix2

hot fix for hdinsight commands
Merge branch 'release-0.8.12' of github.com:Azure/azure-sdk-tools-xplat into release-0.8.12
Merge pull request #1447 from amarzavery/release-0.8.12

Release 0.8.12 version changes
Add disable nh command

This allows a node site to revert to legacy push. It also allows a .Net site to clear NotifcationHub state.
Update records for mobile push nh disable
Merge pull request #1448 from toddreifsteck/release-0.8.12

Add disable nh command
use real null value
Merge pull request #1450 from yugangw-msft/fixgraph

Use null value not empty string to call graph api for listing all
fix grammer error in logout message
Merge pull request #1451 from yugangw-msft/logoutErr

fix grammer error in the logout message
disable 2 known storage tests
add reason for why disable
Updated changelog.txt
keep the test method body, so to maintain nock file consistency