added PIPELINE_VERIFICATION.adoc

docs/using/PIPELINE_VERIFICATION.adoc

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+= Pipeline Verification Jenkinsfile Runner
+:toc:
+:toc-placement: preamble
+:toclevels: 3
+
+Jenkinsfile Runner provides a specific command usable to 
+verify a pipeline without executing it (which 
+run does).
+
+== How to use it
+
+terminal::
+
+[source]
+----
+java -jar \
+-Dapp.repo=./path/to/repo \
+target/jenkinsfile-runner-standalone.jar lint \
+-f ../goodJenkinsFile \
+-w ../.jenkinsfile-runner/war/{jenkins-vers}/jenkins \
+-p ../path/to/plugins
+----
+
+== When to use lint instead of run?
+
+Users should use lint instead of run when there's no
+need to run a pipeline but just the interest in checking its correctness
+
+PROS:
+
+* Faster time execution.
+* Doesn't execute the pipeline, which might have unwanted effects or change the state of other systems.
+
+lint command: 
+
+image::lint-command.gif[lint command example]
+
+run command: 
+
+image::run-command.gif[run command example]
+
+
+
+
+
+
+