[zanata/zanata-server] 130902: Add better handling for server errors

[GitHub]

  Branch: refs/heads/handle-500
  Home:   https://github.com/zanata/zanata-server
  Commit: 130902583b8038c283f79060d06057163c3c7f80
      https://github.com/zanata/zanata-server/commit/130902583b8038c283f79060d06057163c3c7f80
  Author: Sean Flanigan <sflaniga at redhat.com>
  Date:   2016-03-07 (Mon, 07 Mar 2016)

  Changed paths:
    M zanata-test-war/pom.xml
    A zanata-test-war/src/main/java/org/zanata/test/BadResponseFilter.java
    A zanata-test-war/src/main/resources/META-INF/web-fragment.xml
    A zanata-war/src/main/java/org/zanata/rest/ThrowableExceptionMapper.java
    M zanata-war/src/main/java/org/zanata/rest/ZanataServiceExceptionMapper.java

  Log Message:
  -----------
  Add better handling for server errors