Several keys added to dictionary representation of package imported
from Glare to match packages from murano.
Thus, dashboard API works in a similar way, no matter what backend
is used.
It also allows dashboard to filter applications by category and by
some text in name, description or tags.
Change-Id: Ia08a0629e55b8fa318b787d87bb3a2f793cb2a2a
Closes-bug: #1561935