some coverity fixes
fix for linux time parsing and windows idle system process
added test for time parsing
Merge branch 'master' of https://github.com/fredcampos/jnrpe

Conflicts:
	jnrpe-parent/jnrpe-plugins/src/main/java/it/jnrpe/plugin/CheckHttp.java
	jnrpe-parent/jnrpe-plugins/src/main/java/it/jnrpe/plugin/utils/HttpUtils.java