[zanata/zanata-platform] 50b83d: reduce java warnings

[GitHub]

  Branch: refs/heads/ZNTA-2225-zanata-home
  Home:   https://github.com/zanata/zanata-platform
  Commit: 50b83d4141ba908d83bdf63ed27879af1655245b
      https://github.com/zanata/zanata-platform/commit/50b83d4141ba908d83bdf63ed27879af1655245b
  Author: Patrick Huang <pahuang at redhat.com>
  Date:   2017-10-06 (Fri, 06 Oct 2017)

  Changed paths:
    M server/services/src/main/java/org/zanata/file/FileSystemPersistService.java
    M server/services/src/main/java/org/zanata/log4j/ZanataSMTPAppender.java

  Log Message:
  -----------
  reduce java warnings