Header based Locale Selection for the application

[preetkaran20]

Is your feature request related to a problem? Please describe.
Currently we are processing all the files as english locale however, we have few locale existing. The task is to figure out the user locale via the local header from the request headers and use the local specific file in the code.

Code for loading the messages is present at: https://github.com/SasanLabs/VulnerableApp/blob/master/src/main/java/org/sasanlabs/configuration/VulnerableAppConfiguration.java#L38. We need to load the specific file based on request header.

[preetkaran20]

Other similar tasks:

1. Introduce localization framework to the VulnerableApp-facade  VulnerableApp-facade#57
2. Possibility to translate the application into other language #371

[preetkaran20]

#419 Done !!!!