removing unnecessary null check

because a String concatination is being performed on the line above,
even if the 2 values are null (which worst case, they would be an empty
String) we will always end up with a String.
security fix

no need to tell the word what URL and token is being used to trigger
the remote job ;-)
fixing type-o
updating POM file in preparation for release

- changing Jenkins version (1.541 —> 1.509)
- excplcitly including the version of the maven-hpi-plugin to solve a
build issue (as suggested here:
https://groups.google.com/forum/#!topic/jenkinsci-dev/AvLG9MmqEuU)
- fixing some indentations
new functionality: optionally failed build

Default behaviour is to fail the build if the remote build fails.
If this options is enabled, the build will NOT fail if the remote build
fails.
updating screenshot

to dispaly new the “do not fail if remote fails” option
bumping to plugin version to 1.1
Revert "bumping to plugin version to 1.1"

This reverts commit d03bc855ef5ecd1e496bd7828486c48833beb42e.
updating plugin version
fixing SCM in the POM

apparently repo names are case-sensistive, and the Jenkins CI fork has
things in lower-case
[maven-release-plugin] prepare release Parameterized-Remote-Trigger-1.1