oeqa.buildperf: try harder when splitting 'nevr' string

Try to be more intelligent when splitting out recipe name, epoch,
version and revision from the buildstat directory name. Previous
assumption was that package versions never contain a dash but obviously
that is not necessarily true. The new assumption is that the package
version starts with a number.

(From OE-Core rev: 91d3fce1eb3e27d646afba8cf3c03ae560412d1d)

Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oeqa/buildperf/base.py

@@ -425,8 +425,10 @@ class BuildPerfTestCase(unittest.TestCase):
         """Save buildstats"""
         def split_nevr(nevr):
             """Split name and version information from recipe "nevr" string"""
-            name, e_v, revision = nevr.rsplit('-', 2)
-            match = re.match(r'^((?P<epoch>[0-9]{1,5})_)?(?P<version>.*)$', e_v)
+            n_e_v, revision = nevr.rsplit('-', 1)
+            match = re.match(r'^(?P<name>\S+)-((?P<epoch>[0-9]{1,5})_)?(?P<version>[0-9]\S*)$',
+                             n_e_v)
+            name = match.group('name')
             version = match.group('version')
             epoch = match.group('epoch')
             return name, epoch, version, revision