Refactor Email Services to remove implementations args from method signatures

[elbertbautista]

Many of the Services regarding email have method signatures that require HashMap to be passed in. Refactor to pass in Map<String, Object> and make the implementation classes more robust by throwing a descriptive exception if the passed in parameter cannot be cast to the desired type.

Example:

public interface EmailService {

    public boolean sendTemplateEmail(String emailAddress, EmailInfo emailInfo,  HashMap<String,Object> props);

    public boolean sendTemplateEmail(EmailTarget emailTarget, EmailInfo emailInfo, HashMap<String,Object> props);

    public boolean sendBasicEmail(EmailInfo emailInfo, EmailTarget emailTarget, HashMap<String,Object> props);

}

[phillipuniverse]

Looks like this was fixed in @elbertbautista's commit, closing.