add DSL methods for Jacoco Code Coverage publisher
add unit tests for Jacoco Code Coverage publisher DSL method
refactor Jacoco Code Coverage DSL method to follow conventions in publisher context
Update FileJobManagement to store param passed in from System
properties and environment variables.

  - This enables command line testing of DSL jobs that use build parameters.

__SCRIPT_BELOW__
 #!/bin/bash
OUTFILE=simple.job
(
cat <<'EOF'
def jobName="${JOB_NAME_PARAM}"
job {
    name "${jobName}"
    scm {
        git('git://github.com/jgritman/aws-sdk-test.git')
    }
    triggers {
        scm('*/15 * * * *')
    }
    steps {
        maven('-e clean test')
    }
}

EOF
) > $OUTFILE

JOB_NAME_PARAM="DSL-Tutorial-1-Test-param" ./gradlew :job-dsl-core:run  -Pargs=$PWD/simple.job
Merge pull request #72 from bealeaj1214/work/FileJobManagementUpdates

Update FileJobManagement to store param passed in from System properties and environment variables
JENKINS-18968 add grails support.
[FIXED JENKINS-18969] Add dsl method to allow broken build claiming.
[FIXED JENKINS-18964] Add dsl method to add clone workspace SCM.
set grailsContext.useWrapper. add grails(targetsArg, grailsClosure) version. add test for the useWrapperArg.
support hierarchical job model (cloudbees folder)
Conditionally set pom arg.
Merge pull request #79 from quidryan/conditional-pom

Conditionally set pom arg.
Merge pull request #75 from wolfs/cloneWorkspaceScm

[FIXED JENKINS-18964] Add dsl method to add clone workspace SCM.
Merge pull request #76 from sheehan/JENKINS-18968

JENKINS-18968 add grails support.
Deal with enums a little better
Supporting multiple parameters.
Merge pull request #77 from wolfs/claim

[FIXED JENKINS-18969] Add dsl method to allow broken build claiming.
Add filter parameter to runParam()

The "Run Parameter" in Jenkins allows you to select one of "All Builds",
"Completed Builds Only", "Successful Builds Only" or "Stable Builds
Only". This change brings parity to the Jenkins UI.
Add test for runParam() with filter
change default nulls to empty strings.