As an Architect/Migrator I want to be able to specify the packages to be analyzed. If no packages are specified, then all packages identified as 'application packages' will be analyzed unless the analysis of known Open Source libraries is requested.

Acceptance criteria:

• The user can navigate to the next or previous step in the analysis configuration without entering any package details.
• The user can manually add packages.
• The user can delete packages.
• The package/subpackage names must only contain alphanumeric characters and the period character.
• There will be no validation of overlap, so for example the user could legitimately enter mypackage.persistence mypackage.persistence.jdbc