SIPp python test module

[nanang]

In 4147:

Re #1523: Initial version of SIPp python test module.

[nanang]

In 4177:

Close #1523:

• updated scenarios to work with mod_sipp.py (adding config .py file, etc)
• integrated mod_sipp.py to runall.py
• removed uas.xml, as it is similar to recvfrom\100_simple.py (REGISTER+resp 200)
• renamed scenarios (to allow running these SIPp scenarios without .py file):
  • prack_fork.xml -> uas-prack_fork.xml
  • inv_401_retry_after_100.xml -> uas-inv_401_retry_after_100.xml

[nanang]

In 4178:

Re #1523: added sipp scenario for call transfer (attended & unattended).

[nanang]

In 4179:

Re #1523: fixed mod_sipp.py problems in executing sipp on unix/mac platforms, i.e: should run on shell and non-background mode.

[nanang]

In 4183:

Re #1523:

• runall.py: fix option parser
• run.py: avoid double newlines in logging
• mod_sipp.py: redirect sipp output to /dev/null & add sipp error string
• misc fixes on sipp scenarios, e.g: regex to get via branch, file rename.

[nanang]

In 4184:

Re #1523: avoid false failure reported by sipp scenario uas-422-then-200-bad-se.xml due to codec mismatch.

[nanang]

In 4187:

Re #1523: sipp output redirection to /dev/null somehow caused sipp unresponsive when the test is run under cdash.

[nanang]

In 4188:

Re #1523: use random port for PJSUA instance(s) and configurable SIPp port.