SubstringMatchingRuleTest.java:
Added strings() + used it in all subclasses.

git-svn-id: https://svn.forgerock.org/opendj/trunk/opendj@11081 41b1ffd8-f28e-4786-ab96-9950f0a78031
PerformanceRunner.java:
Extracted local PrintStream variable rather than always calling app.getOutputStream().

git-svn-id: https://svn.forgerock.org/opendj/trunk/opendj@11085 41b1ffd8-f28e-4786-ab96-9950f0a78031