HDDS-5423. Robot test should print the entire exception stack trace.

[mukul1987]

What changes were proposed in this pull request?

Robot test truncates the exception lines in the output, this jira ensures that the entire exception is printed.

https://robotframework.org/robotframework/latest/RobotFrameworkUserGuide.html#limiting-error-message-length-in-reports

What is the link to the Apache JIRA

https://issues.apache.org/jira/browse/HDDS-5423

How was this patch tested?

Observed output of another excpetion trace with the option enabled.

[adoroszlai]

@mukul1987 The doc says: full error messages are always visible in log files as messages of the failed keywords. Do we really need the full error in regular output, too?

Try this test:

*** Settings ***
Library    OperatingSystem

*** Test Cases ***
Long message
    ${rc}    ${output} =    Run And Return Rc And Output    cat /etc/passwd
    Should Contain    ${output}    asdfqwerty

output.xml would have the complete message ('... (full contents of /etc/passwd)' does not contain 'asdfqwerty').