Merge pull request #155 from wilkinsona/powermock-upgrade

Upgrade to PowerMock 1.6.1

gradle/javaprojects.gradle

@@ -21,7 +21,7 @@ ext.hsqlVersion = '2.3.1'
 ext.slf4jVersion = '1.7.5'
 ext.logbackVersion = '0.9.29'
 ext.cglibVersion = '2.2'
-ext.powerMockVersion = '1.5.1'
+ext.powerMockVersion = '1.6.1'
 ext.servletApiVersion = '3.0.1'
 ext.seleniumVersion = '2.33.0'
 ext.groovyVersion = '2.0.5'