update plugin name with azure prefix

[xscript]

• fix Should rename the deploy goal - azure-webapp:deploy #24
• fix Plugin name #25

[msftclas]

@xscript,
Thanks for your contribution as a Microsoft full-time employee or intern. You do not need to sign a CLA.
Thanks,
Microsoft Pull Request Bot

[codecov-io]

Codecov Report

Merging #27 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master     #27   +/-   ##
======================================
  Coverage    78.4%   78.4%           
======================================
  Files          27      27           
  Lines         704     704           
  Branches       88      88           
======================================
  Hits          552     552           
  Misses        127     127           
  Partials       25      25

Impacted Files	Coverage Δ
...src/main/java/com/microsoft/azure/maven/Utils.java	89.28% <ø> (ø)
...pp/handlers/PrivateRegistryRuntimeHandlerImpl.java	50% <ø> (ø)
...in/java/com/microsoft/azure/maven/FTPUploader.java	44.26% <ø> (ø)
.../com/microsoft/azure/maven/webapp/WebAppUtils.java	52.17% <ø> (ø)
...pp/handlers/PublicDockerHubRuntimeHandlerImpl.java	70% <ø> (ø)
.../maven/webapp/handlers/FTPArtifactHandlerImpl.java	100% <ø> (ø)
...om/microsoft/azure/maven/auth/AzureAuthHelper.java	86.73% <ø> (ø)
...osoft/azure/maven/webapp/DeployFacadeBaseImpl.java	74.07% <ø> (ø)
.../maven/webapp/handlers/NullRuntimeHandlerImpl.java	100% <ø> (ø)
...a/com/microsoft/azure/maven/AbstractAzureMojo.java	65.57% <ø> (ø)
... and 7 more

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