Update unittest-e2etest.md

[habbes]

Fix grammar and syntax errors.

[opbld31]

Docs Build status updates of commit 0284e03:

:warning: Validation status: warnings

File	Status	Preview URL	Details
Odata-docs/webapi/unittest-e2etest.md	:warning:Warning	View	Details
Odata-docs/odatalib/v7/fluent-writer-api.md	:warning:Warning	View	Details

Odata-docs/webapi/unittest-e2etest.md

• [Warning] Missing attribute: author. Add the current author's GitHub ID.

Odata-docs/odatalib/v7/fluent-writer-api.md

• Line 22: [Warning] Link 'https://msdn.microsoft.com/en-us/library/system.action(v=vs.110).aspx' contains locale code 'en-us'. For localizability, remove 'en-us' from links to most Microsoft sites.

For more details, please refer to the build report.

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[opbld33]

Docs Build status updates of commit eba6158:

:warning: Validation status: warnings

File	Status	Preview URL	Details
Odata-docs/webapi/unittest-e2etest.md	:warning:Warning	View	Details

Odata-docs/webapi/unittest-e2etest.md

• [Warning] Missing attribute: author. Add the current author's GitHub ID.

For more details, please refer to the build report.

Note: If you changed an existing file name or deleted a file, broken links in other files to the deleted or renamed file are listed only in the full build report.