SimpleServer no longer sets server and date headers.
Move error handler and log formatter implementations from molecule to petstore package

--HG--
rename : webapp/src/main/java/org/testinfected/molecule/util/ConsoleHandler.java => webapp/src/main/java/org/testinfected/petstore/util/ConsoleHandler.java
rename : webapp/src/main/java/org/testinfected/molecule/util/PlainFormatter.java => webapp/src/main/java/org/testinfected/petstore/util/PlainFormatter.java