ONAPWelcomeController sonar issue fix

String viewName and getter/setter can be romoved from his class.
ONAPWelcomeController Overrides this field 1 to 1.

Issue-ID: PORTAL-652
Change-Id: Idbb41f52a63c6ea681f6ba7753991d766849e3a2
Signed-off-by: Dominik Mizyn <d.mizyn@samsung.com>
1 file changed