Issues in Appointment Reservation - Hospital Service

[isuruuy429]

Description:
Following issues are found in hospital-service. (ClemencyHospitalService)

Issue 1

When it is added a different hospital(a hospital which doctor is not available) under doctor while appointment reservation, still the appointment is made. Once the appointment details are received through getAppointment, it displays the data of the doctor's original hospital. This is for the already defined doctors in clemency-hospital-service.bal.

Steps to reproduce

1. Get doctors under category surgery for the already available doctors.
   http://localhost:9090/healthcare/surgery

Following payload is received.

 {
        "name": "anne clement",
        "hospital": "clemency medical center",
        "category": "surgery",
        "availability": "8.00 a.m - 10.00 a.m",
        "fee": 12000
    },
    {
        "name": "thomas collins",
        "hospital": "grand oak community hospital",
        "category": "surgery",
        "availability": "9.00 a.m - 11.00 a.m",
        "fee": 7000
    },
    {
        "name": "seth mears",
        "hospital": "pine valley community hospital",
        "category": "surgery",
        "availability": "3.00 p.m - 5.00 p.m",
        "fee": 8000
    }

2.Reserve the appointment as below. For the hospital provide any bogus value.

{  
	"patient":
	{  
        "name":"K Winslet",
        "dob":"1970-03-19",
        "ssn":"234-987-175",
        "address":"Canada",
        "phone":"32456789765",
        "email":"kwinslet@gmail.com"
    },
	"doctor":"anne clement",
	"hospital":"sdfgh",
	"appointmentDate":"2020-01-22"
}

3. Check the response payload.

{
    "appointmentNumber": 18,
    "doctor": {
        "name": "anne clement",
        "hospital": "clemency medical center",
        "category": "surgery",
        "availability": "8.00 a.m - 10.00 a.m",
        "fee": 12000
    },
    "patient": {
        "name": "K Winslet",
        "dob": "1970-03-19",
        "ssn": "234-987-175",
        "address": "Canada",
        "phone": "32456789765",
        "email": "kwinslet@gmail.com"
    },
    "fee": 12000,
    "confirmed": false,
    "appointmentDate": "2020-01-22"
}

This issue occurs for the already available doctors only. Once we add a new doctor and retry the same steps following response is received.
'Doctor K Amugoda is not available in clemency medical center'. This should be the expected behavior for already available doctors.

Issue 2

Appointments can be reserved for a past date.

Issue 3

Following fields are not validated.
email address, phone, dob, date

Issue 4

Adding a new doctor is repeated in hospital service which is in healthcare service.