rteval: Fix sysreport traceback when utility sos not found

When rteval is run with
-s, --sysreport       run sysreport to collect system data (default: False)

and sos, sosreport or sysreport cannot be found then rteval exits with
an error.

Fix this by adding /usr/bin to the places to search for this program.

Signed-off-by: John Kacur <jkacur@redhat.com>
diff --git a/rteval/sysinfo/osinfo.py b/rteval/sysinfo/osinfo.py
index 3d6d5f8..3bdbcc8 100644
--- a/rteval/sysinfo/osinfo.py
+++ b/rteval/sysinfo/osinfo.py
@@ -45,10 +45,16 @@
     def run_sysreport(self, repdir):
         if os.path.exists('/usr/sbin/sos'):
             exe = '/usr/sbin/sos report'
+        elif os.path.exists('/usr/bin/sos'):
+            exe = '/usr/bin/sos report'
         elif os.path.exists('/usr/sbin/sosreport'):
             exe = '/usr/sbin/sosreport'
+        elif os.path.exists('/usr/bin/sosreport'):
+            exe = '/usr/bin/sosreport'
         elif os.path.exists('/usr/sbin/sysreport'):
             exe = '/usr/sbin/sysreport'
+        elif os.path.exists('/usr/bin/sysreport'):
+            exe = '/usr/bin/sysreport'
         else:
             raise RuntimeError("Can't find sos/sosreport/sysreport")