renamed job name from samplejob to sample in step 4

While creating a new scheduler in Azure portal, scheduler name must
match the name of the job created in solution EXCLUDING the 'Job'
keyword. For example for creating a scheduled job for SampleJob, it must
be named as "Sample". If SampleJob is used, it will result in an 404
error.

In this commit:
-Fixed the 2 images which were showing SampleJob to Sample
-Fixed the article instruction 4 to name scheduler as Sample in place of
SampleJob
Update sql-database-auditing-get-started.md

Removing preview text - Azure SQL DB Auditing became GA
fix bugs in two hdi articles
Merged with master
fix azure sendgrid php documentation
fix azure sendgrid php documentation
fix azure sendgrid php documentation
Changed documentation for nodeJs
sendgrid-java
sendgrid node js
updated "Send email from Mobile Services with SendGrid"
update "Send email from Mobile Services with SendGrid"
sendgrid mobile
update "Send email from Mobile Services with SendGrid"
sendgrid mobile
minor fixes
new source control publishing note
updates to code based on customer feedback.
Merge branch 'master' of https://github.com/Azure/azure-content-pr into stormupdate
VS Getting Started Pages: Fix image reference issue