[backend] product converter: die when a used condition is not defined.
[api] avoid double listings in results of owner search
[backend] productconverter: fix wording in flavor package README
[backend] take swap space into account for memory requirements in constraints
[backend] fix receiving build results again
[backend] always use sha256 for openssl sign
[api] special webui mode for owner search, it returns all package instances, if a search does not match
[backend] report swap device size when using native devices
[backend] bs_worker: use lazy unmount if TMPFS is used

Use lazy unmount if TMPFS is used as the worker dies if someone
watches the live buildlog during build, because the FS is busy.
[ci] rake -> bundle exec rake.
[backend] support build constraint to physical memory excluding swap space
[api] avoid error 500 when sending invalid XML to create a request
[api] fix test cases by adding missing files
[api] create links for .rng schema files as well during apidocs generation
[webui] Add some more options to configuration
[webui] Start of the new set_bugowner multi-request
[webui] Add set_bugowner request link to owner results
[webui] Handle the case of only one result for the set_bugowner dialog
[webui] Fix the submitted xml, add group field to set_bugowner
[webui] Fix testsuite for the search controller