update model
fix error in database.properties
file upload & download
Merge remote-tracking branch 'origin/develop' into develop
fix
Merge remote-tracking branch 'origin/develop' into develop

Conflicts:
	src/main/java/com/telecom/billing/Utils/ExcelUtils.java
Merge remote-tracking branch 'origin/develop' into develop

Conflicts:
	src/main/java/com/telecom/billing/Utils/ExcelUtils.java
export Rates Sheet & Rate pdf