Update 20487C_MOD07_LAK.md
Update 20487C_MOD07_LAK.md

1) Added instruction to initialize the WCF relay.
2)Changed incorrect project names and azure publish button names in the instructions
MicrosoftLearning/20487-DevelopingWindowsAzureAndWebServices,MicrosoftLearning/20487-DevelopingWindowsAzureAndWebServices,MicrosoftLearning/20487-DevelopingWindowsAzureAndWebServices