[zanata/zanata-platform] 7342ed: fix findbugs warnings

[GitHub]

  Branch: refs/heads/ZNTA-2190-webjars
  Home:   https://github.com/zanata/zanata-platform
  Commit: 7342edbf2b1d05ad87d383f2448c1fe6a4281241
      https://github.com/zanata/zanata-platform/commit/7342edbf2b1d05ad87d383f2448c1fe6a4281241
  Author: Sean Flanigan <sflaniga at redhat.com>
  Date:   2017-09-01 (Fri, 01 Sep 2017)

  Changed paths:
    M server/services/src/main/java/org/zanata/util/CommonMarkRenderer.java
    M server/services/src/main/java/org/zanata/util/RunnableEx.java
    M server/services/src/test/java/org/zanata/service/impl/ActivityServiceImplTest.java

  Log Message:
  -----------
  fix findbugs warnings