EventLoopTest: Fix ATN test failures.

Remove -s switch from athena tests.  Was causing a false match against
the error pattern.


Former-commit-id: e7489f71

AtlasTest/EventTest/EventLoopTest/test/ByteStreamReadTest.xml

 <unifiedTestConfiguration>
   <atn>
      <TEST name="ByteStreamReadTest" type="athena" suite="Examples">
-        <options_atn>-s EventLoopTest/ByteStreamReadTest.py</options_atn>
+        <options_atn>EventLoopTest/ByteStreamReadTest.py</options_atn>
         <timelimit>5</timelimit>
         <author> Hong Ma </author>
         <mailto> hma@bnl.gov </mailto>

AtlasTest/EventTest/EventLoopTest/test/EventMixerTest.xml

 <unifiedTestConfiguration>
   <atn>
      <TEST name="EventMixer" type="athena" suite="Examples">
-        <options_atn>-s AthenaServices/MixingEventSelector_test.py</options_atn>
+        <options_atn> AthenaServices/MixingEventSelector_test.py</options_atn>
         <timelimit>15</timelimit>
         <author> Paolo Calafiura </author>
         <mailto> pcalafiura@lbl.gov </mailto>

AtlasTest/EventTest/EventLoopTest/test/MultiplePassTest.xml

 <unifiedTestConfiguration>
   <atn>
      <TEST name="MultiplePass" type="athena" suite="Examples">
-        <options_atn>-s AthenaServices/MultiplePass_test.py</options_atn>
+        <options_atn> AthenaServices/MultiplePass_test.py</options_atn>
         <timelimit>5</timelimit>
         <author> Paolo Calafiura </author>
         <mailto> pcalafiura@lbl.gov </mailto>
@@ -14,7 +14,7 @@
   </atn>
   <atn>
      <TEST name="MultiplePassWithAlgFilter" type="athena" suite="Examples">
-        <options_atn>-s AthenaServices/MultiplePassWithAlgFilter_test.py</options_atn>
+        <options_atn> AthenaServices/MultiplePassWithAlgFilter_test.py</options_atn>
         <timelimit>5</timelimit>
         <author> Paolo Calafiura </author>
         <mailto> pcalafiura@lbl.gov </mailto>