[FIX] sap.m.MessageBox: Dependency to sap.ui.layout package is now removed
[FIX] sap.m.MessageBox: Dependency to sap.ui.layout package is now removed

- The VerticalLayout is replaced with VBox
- Fixed dependencies declarations

Fixes https://github.com/SAP/openui5/issues/805

Change-Id: Ief22dbf8dfcd3e036765a5e3b520ca3d31f9a191

nzamani/openui5,cschuff/openui5,SQCLabs/openui5,SQCLabs/openui5,SQCLabs/openui5,cschuff/openui5,SAP/openui5,nzamani/openui5,olirogers/openui5,cschuff/openui5,olirogers/openui5,SAP/openui5,olirogers/openui5,nzamani/openui5,SAP/openui5,SAP/openui5