Sonar - Exception handling
Merge branch 'master' of https://github.com/dhanasiddharth/Dashboard.git

Conflicts:
	src/main/java/org/hpccsystems/dashboard/api/controller/DashboardApiController.java
	src/main/java/org/hpccsystems/dashboard/services/impl/AuthenticationServiceImpl.java
	src/main/java/org/hpccsystems/dashboard/services/impl/ChartServiceImpl.java
	src/main/java/org/hpccsystems/dashboard/services/impl/HPCCServiceImpl.java
	src/main/java/org/hpccsystems/dashboard/services/impl/LDAPAuthenticationServiceImpl.java
	src/main/java/org/hpccsystems/dashboard/services/impl/WidgetServiceImpl.java