Report Validation Errors regardless components selected for installation

[dgolovin]

During installation installer should verify that several prerequisites are met in general for whole installer, examples are:

1. Verification for platform architecture 32-bit/64-bit (there is no verification for that yet);
2. Physical memory installed more than minimal amount required where minimum amount is calculated from across all stack components available for installation;
3. The same applies to disk space;
4. Internet access to download required components for online iunstaller.

For problems like this currently there is no suitable page to show in installer.

Migrated from https://issues.jboss.org/browse/JBDS-4063.