[11] RFR(XS): 8206241 "compiler/graalunit/PhasesCommonTest.java fails with java.lang.Error: TESTBUG: no tests found for prefix org.graalvm.compiler.phases.common.test"

[Ekaterina Pavlova]

Hi All,

please review this small fix.
The cause of the failure is that the string of tests returned by com.oracle.mxtool.junit.FindClassesByAnnotatedMethods
command was ended by line separator string. The issue is intermittent because returned list of tests was not always in the same order.

     JBS: https://bugs.openjdk.java.net/browse/JDK-8206241
  webrev: http://cr.openjdk.java.net/~epavlova//8206241/webrev.00/index.html
testing: tested by running all graalunit tests 100 times


Thanks,
-katya

p.s.
  Igor Ignatyev volunteered to sponsor this change.