Created class AdminEmailReportController - this class sends email
attachments to applicants:
1. EMAIL missingDocuments PDF Form to Prospective Student. this creates
MissingDocumentsPDF in the server and attaches the file to the email.
2. EMAIL acceptanceLetter PDF Form to Prospective Student. this creates
AcceptanceLetterPDF in the server and attaches the file to the email.

TO DO. Both files in the server should be deleted from server after file
is emailed successfully.

AdminPDFReportGenerator class - updated the method addMetaData()