[k8s-automation]: rt_number need to be treated as string

[Pulkit Tandon]

In R5.0 contrail-test using "contrail_test_inputs.yaml" we use following format for setting router_asn and public_vn:
    router_asn: 64512
    public_rt: 2225

Whn contrail_test_init.py "parse_yml_file" reads them, it populates them as integer.

Earlier parse_ini_file used to read these values as a string.
Thus, the values self.mx_rt and self.router_asn are treated as string everywhere.
Treating them as integer can lead to issues as these variables have been used as string everywhere. Thus, changing it to a "str" variable.

For e.g., I landed into following issue:

======================================================================
ERROR: setUpClass (scripts.k8s_scripts.test_service.TestService)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "scripts/k8s_scripts/test_service.py", line 15, in setUpClass
    super(TestService, cls).setUpClass()
  File "common/k8s/base.py", line 52, in setUpClass
    api_option='contrail')
  File "tcutils/util.py", line 997, in __call__
    Singleton, cls).__call__(*args, **kwargs)
  File "common/create_public_vn.py", line 40, in __init__
    self.create_public_vn(mx_rt)
  File "common/create_public_vn.py", line 87, in create_public_vn
    assert self.public_vn_fixture.verify_on_setup()
  File "/contrail-test/fixtures/vn_test.py", line 579, in verify_on_setup
    if not self.verify_vn_in_api_server():
  File "tcutils/util.py", line 62, in f_retry
    result = f(*args, **kwargs) # first attempt
  File "/contrail-test/fixtures/vn_test.py", line 674, in verify_vn_in_api_server
    if not any(item.endswith(self.rt_number) for item in self.rt_names):
  File "/contrail-test/fixtures/vn_test.py", line 674, in <genexpr>
    if not any(item.endswith(self.rt_number) for item in self.rt_names):
TypeError: endswith first arg must be str, unicode, or tuple, not int

Reason:
(Pdb) self.rt_names
['target:64512:8000004', 'target:64512:2225']
(Pdb) self.rt_names[1]
'target:64512:2225'
(Pdb) self.rt_number
2225
(Pdb) self.rt_names[1].endswith(self.rt_number)
*** TypeError: endswith first arg must be str, unicode, or tuple, not int

This fails complete k8s sanity in a particular case where MX_GW_TEST=1

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/41789
Submitter: Pulkit Tandon (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/41790
Submitter: Pulkit Tandon (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/41789
Submitter: Pulkit Tandon (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/41790
Submitter: Pulkit Tandon (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/41789
Committed: http://github.com/Juniper/contrail-test/commit/99ee7da708a07d23f49f8acad85d2b2a4c1ba762
Submitter: Zuul v3 CI (<email address hidden>)
Branch: master

commit 99ee7da708a07d23f49f8acad85d2b2a4c1ba762
Author: Pulkit Tandon <email address hidden>
Date: Thu Apr 12 13:04:57 2018 +0530

Made mx_rt and rt_number as str so that they can be treated
in the same way when testbed.py was used.

Change-Id: I7270ef27af25dcb51051d09c6445510f9eef2640
Closes-bug: #1763290

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/41790
Submitter: Pulkit Tandon (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/41790
Committed: http://github.com/Juniper/contrail-test/commit/efe2062c84dad2729f28ce8576ad2902cd7d1f14
Submitter: Zuul v3 CI (<email address hidden>)
Branch: R5.0

commit efe2062c84dad2729f28ce8576ad2902cd7d1f14
Author: Pulkit Tandon <email address hidden>
Date: Thu Apr 12 13:04:57 2018 +0530

Made mx_rt and rt_number as str so that they can be treated
in the same way when testbed.py was used.

Change-Id: I7270ef27af25dcb51051d09c6445510f9eef2640
Closes-bug: #1763290

[Pulkit Tandon (pulkitt)]

Verified on Latest R5.0 release 16
Master release build