def response = httpRequest authentication: 'JENKINS', customHeaders: [[maskValue: false, name: 'Content-type', value: 'application/xml']], 
ignoreSslErrors: true, outputFile: 'config.xml', responseHandle: "STRING", url: 'http://localhost:8080/job/FOLDER/job/template/config.xml', 
validResponseCodes: '100:399' 
def myxml= "'"+response.content+"'"
def response1 = httpRequest authentication: 'JENKINS', customHeaders: [[maskValue: false, name: 'Content-Type', value: 'TEXT_PLAIN'],
[maskValue: false, name: 'requestBody', value: myxml],
[maskValue: false, name: 'consoleLogResponseBody', value: 'true'],
[maskValue: false, name: 'authentication', value: 'BASIC']
], httpMode: 'POST', ignoreSslErrors: true, url: "http://localhost:8080/createItem?name=new_job" 

def response = httpRequest authentication: 'JENKINS', customHeaders: [[maskValue: false, name: 'Content-type', value: 'application/xml']], 
ignoreSslErrors: true, outputFile: 'config.xml', responseHandle: "STRING", url: 'http://localhost:8080/job/FOLDER/job/template/config.xml', 
validResponseCodes: '100:399' 
def myxml= "'"+response.content+"'"
def response1 = httpRequest authentication: 'JENKINS', customHeaders: [[maskValue: false, name: 'Content-Type', value: 'multipart/form-data'],
], httpMode: 'POST',multipartName: 'config.xml', ignoreSslErrors: true, url: "http://localhost:8080/createItem?name=new_job"   

hudson.AbortException: Fail: the returned code 400 is not in the accepted range: [[100‥399]]
	at jenkins.plugins.http_request.HttpRequestExecution.responseCodeIsValid(HttpRequestExecution.java:353)
	at jenkins.plugins.http_request.HttpRequestExecution.processResponse(HttpRequestExecution.java:363)
	at jenkins.plugins.http_request.HttpRequestExecution.authAndRequest(HttpRequestExecution.java:279)
	at jenkins.plugins.http_request.HttpRequestExecution.call(HttpRequestExecution.java:215)
Caused: java.lang.IllegalStateException
	at jenkins.plugins.http_request.HttpRequestExecution.call(HttpRequestExecution.java:218)