healthcare fix - str encode to utf-8 (#14213)

diff --git a/erpnext/healthcare/doctype/consultation/consultation.py b/erpnext/healthcare/doctype/consultation/consultation.py
index ebf80d6..30b3734 100755
--- a/erpnext/healthcare/doctype/consultation/consultation.py
+++ b/erpnext/healthcare/doctype/consultation/consultation.py
@@ -6,7 +6,7 @@
 import frappe
 from frappe import _
 from frappe.model.document import Document
-from frappe.utils import getdate
+from frappe.utils import getdate, cstr
 import json
 from erpnext.healthcare.doctype.healthcare_settings.healthcare_settings import get_receivable_account, get_income_account
 
@@ -125,7 +125,7 @@
 def set_subject_field(consultation):
 	subject = "No Diagnosis "
 	if(consultation.diagnosis):
-		subject = "Diagnosis: \n"+ str(consultation.diagnosis)+". "
+		subject = "Diagnosis: \n"+ cstr(consultation.diagnosis)+". "
 	if(consultation.drug_prescription):
 		subject +="\nDrug(s) Prescribed. "
 	if(consultation.test_prescription):
diff --git a/erpnext/healthcare/doctype/lab_test/lab_test.py b/erpnext/healthcare/doctype/lab_test/lab_test.py
index 3ad8b53..b3b64f4 100644
--- a/erpnext/healthcare/doctype/lab_test/lab_test.py
+++ b/erpnext/healthcare/doctype/lab_test/lab_test.py
@@ -6,7 +6,7 @@
 import frappe
 from frappe.model.document import Document
 import json
-from frappe.utils import getdate
+from frappe.utils import getdate, cstr
 from erpnext.healthcare.doctype.healthcare_settings.healthcare_settings import get_receivable_account
 from frappe import _
 
@@ -228,9 +228,9 @@
 	return employee
 
 def insert_lab_test_to_medical_record(doc):
-	subject = str(doc.test_name)
+	subject = cstr(doc.test_name)
 	if(doc.test_comment):
-		subject += ", \n"+str(doc.test_comment)
+		subject += ", \n"+ cstr(doc.test_comment)
 	medical_record = frappe.new_doc("Patient Medical Record")
 	medical_record.patient = doc.patient
 	medical_record.subject = subject
diff --git a/erpnext/healthcare/doctype/vital_signs/vital_signs.py b/erpnext/healthcare/doctype/vital_signs/vital_signs.py
index dea848d..9aa055c 100644
--- a/erpnext/healthcare/doctype/vital_signs/vital_signs.py
+++ b/erpnext/healthcare/doctype/vital_signs/vital_signs.py
@@ -5,6 +5,7 @@
 from __future__ import unicode_literals
 import frappe
 from frappe.model.document import Document
+from frappe.utils import cstr
 
 class VitalSigns(Document):
 	def on_submit(self):
@@ -33,16 +34,16 @@
 def set_subject_field(doc):
 	subject = " "
 	if(doc.temperature):
-		subject += "Temperature: \n"+ str(doc.temperature)+". "
+		subject += "Temperature: \n"+ cstr(doc.temperature)+". "
 	if(doc.pulse):
-		subject += "Pulse: \n"+ str(doc.pulse)+". "
+		subject += "Pulse: \n"+ cstr(doc.pulse)+". "
 	if(doc.respiratory_rate):
-		subject += "Respiratory Rate: \n"+ str(doc.respiratory_rate)+". "
+		subject += "Respiratory Rate: \n"+ cstr(doc.respiratory_rate)+". "
 	if(doc.bp):
-		subject += "BP: \n"+ str(doc.bp)+". "
+		subject += "BP: \n"+ cstr(doc.bp)+". "
 	if(doc.bmi):
-		subject += "BMI: \n"+ str(doc.bmi)+". "
+		subject += "BMI: \n"+ cstr(doc.bmi)+". "
 	if(doc.nutrition_note):
-		subject += "Note: \n"+ str(doc.nutrition_note)+". "
+		subject += "Note: \n"+ cstr(doc.nutrition_note)+". "
 
 	return subject