Fix garbage collection remnants in queuing adaptors, typo in http adaptor, variable initialization in pbs adaptor

(saga-python)merzky@thinkie:~/saga/saga-python (fixes *=) $ python tests/run_tests.py -c tests/configs/pbs_ssh_sierra.cfg
Running the following configurations:
 * tests/configs/pbs_ssh_sierra.cfg
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pbs_ssh_sierra.cfg : api/job
..........F.......F..
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FAIL: Test job.suspend()/resume() - expecting state: SUSPENDED/RUNNIG
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Traceback (most recent call last):
  File "/home/merzky/.virtualenv/saga-python/local/lib/python2.7/site-packages/nose-1.2.1-py2.7.egg/nose/case.py", line 197, in runTest
    self.test(*self.arg)
  File "/home/merzky/saga/saga-python/tests/unittests/api/job/test_job.py", line 233, in test_job_suspend_resume
    assert tc.notimpl_warn_only, "%s " % ni
AssertionError: NotImplemented: Job.suspend is not implemented for saga.adaptor.pbsjob.PBSJob (suspend)

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FAIL: Test to submit a job via run_job, and retrieve id
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Traceback (most recent call last):
  File "/home/merzky/.virtualenv/saga-python/local/lib/python2.7/site-packages/nose-1.2.1-py2.7.egg/nose/case.py", line 197, in runTest
    self.test(*self.arg)
  File "/home/merzky/saga/saga-python/tests/unittests/api/job/test_service.py", line 81, in test_run_job
    assert tc.notimpl_warn_only, "%s " % ni
AssertionError: NotImplemented: Service.run_job is not implemented for saga.adaptor.pbsjob.PBSJobService (run_job)

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Ran 21 tests in 117.013s

FAILED (failures=2)
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