Imagine we have "platform:f29.0.0" and "platform:f29.1.0" base modules.
We also have "DBI" module we want to build agaisnt "platform:f29.1.0".
This "DBI" module depends on "perl" module which is only build against
"platform:f29.0.0".
Currently, DBI build would fail to resolve the dependencies, because
it wouldn't find "perl" module, because it is built against different
platform stream.
This PR changes the MSE code to include buildrequired module builds built
against all the compatible platform streams.
It does so by introducing following changes:
- MSE code uses new get_base_module_mmds() method to find out all the
compatible platform modules. This needed new methods in DBResolver
and MBSResolver.
- For each buildrequired module defined by name:stream, the MSE code then
finds particular NSVC built against each compatible platform module.
Side effect of these code changes is that every module now must buildrequire
some base module.
koji now supports tags with max length of 256, we can use
more informative tag name instead of the hash one.
The new format of koji tag name is:
module-<name>-<stream>-<version>-<context>
However when the generated tag's length > (256 - len('build')), we
fallback to the old way of name in hash format (module-<hash>).
In this change, koji tag is always generated from MBS itself, even
with pdc resolver.
FIXES: #918#925
