Invalid XML char in log output breaks CLI output follow mode.

[gschueler]

from https://groups.google.com/d/topic/rundeck-discuss/JJ5RFAa3Of0/discussion

CLI follow mode fails with exception:

An invalid XML character (Unicode: 0x8) was found in the element content of the document. Nested exception: An invalid XML character (Unicode: 0x8) was found in the element content of the document.
org.dom4j.DocumentException: Error on line 1 of document  : An invalid XML character (Unicode: 0x8) was found in the element content of the document. Nested exception: An invalid XML character (Unicode: 0x8) was found in the element content of the document.
    at org.dom4j.io.SAXReader.read(SAXReader.java:482)
    at org.dom4j.io.SAXReader.read(SAXReader.java:343)
    at com.dtolabs.client.utils.WebserviceHttpClientChannel.postMakeRequest(WebserviceHttpClientChannel.java:283)
    at com.dtolabs.client.utils.HttpClientChannel.makeRequest(HttpClientChannel.java:396)
    at com.dtolabs.client.services.ServerService.makeRundeckRequest(ServerService.java:182)
    at com.dtolabs.client.services.ServerService.makeRundeckRequest(ServerService.java:134)
    at com.dtolabs.client.services.ServerService.makeRundeckRequest(ServerService.java:97)
    at com.dtolabs.client.services.RundeckAPICentralDispatcher.followDispatcherExecution(RundeckAPICentralDispatcher.java:819)
    at com.dtolabs.rundeck.core.cli.queue.QueueTool.followAction(QueueTool.java:484)
    at com.dtolabs.rundeck.core.cli.run.RunTool.followOutput(RunTool.java:504)
    at com.dtolabs.rundeck.core.cli.run.RunTool.jobrunAction(RunTool.java:489)
    at com.dtolabs.rundeck.core.cli.run.RunTool.go(RunTool.java:392)
    at com.dtolabs.rundeck.core.cli.BaseTool.run(BaseTool.java:107)
    at com.dtolabs.rundeck.core.cli.run.RunTool.main(RunTool.java:124)
Nested exception: 
org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 5841; An invalid XML character (Unicode: 0x8) was found in the element content of the document.
    at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
    at org.dom4j.io.SAXReader.read(SAXReader.java:465)
    at org.dom4j.io.SAXReader.read(SAXReader.java:343)
    at com.dtolabs.client.utils.WebserviceHttpClientChannel.postMakeRequest(WebserviceHttpClientChannel.java:283)
    at com.dtolabs.client.utils.HttpClientChannel.makeRequest(HttpClientChannel.java:396)
    at com.dtolabs.client.services.ServerService.makeRundeckRequest(ServerService.java:182)
    at com.dtolabs.client.services.ServerService.makeRundeckRequest(ServerService.java:134)
    at com.dtolabs.client.services.ServerService.makeRundeckRequest(ServerService.java:97)
    at com.dtolabs.client.services.RundeckAPICentralDispatcher.followDispatcherExecution(RundeckAPICentralDispatcher.java:819)
    at com.dtolabs.rundeck.core.cli.queue.QueueTool.followAction(QueueTool.java:484)
    at com.dtolabs.rundeck.core.cli.run.RunTool.followOutput(RunTool.java:504)
    at com.dtolabs.rundeck.core.cli.run.RunTool.jobrunAction(RunTool.java:489)
    at com.dtolabs.rundeck.core.cli.run.RunTool.go(RunTool.java:392)
    at com.dtolabs.rundeck.core.cli.BaseTool.run(BaseTool.java:107)
    at com.dtolabs.rundeck.core.cli.run.RunTool.main(RunTool.java:124)