Overview

Add suites for integration tests to reduce test time and reduce cluster instances on CI.
Each test in suite should reuse nsm / forwarder.

For example:

We have a suite of tests for cluster:

1. TestNSCDiesSingleNode
2. TestSimpleMemifConnection
3. TestNSCDiesMultiNode
4. TestNSEDiesMultiNode

How it will work:

1. TestNSCDiesSingleNode started on CI. It checks namespace NSM_NAMESPACE and doesn't find NSM PODs*. The test will deploy NSM PODs.
2. TestSimpleMemifConnection started on CI. It checks namespace NSM_NAMESPACE and finds NSM PODs. The test will reuse NSM PODs.
3. TestNSCDiesMultiNode started on CI. It checks namespace NSM_NAMESPACE and finds NSM PODs. The test will reuse NSM PODs.
4. TestNSEDiesMultiNode started on CI. It checks namespace NSM_NAMESPACE and finds NSM PODs. The test will reuse NSM PODs.
5. Suite finished on CI and cloudiest will cleanup resources in NSM_NAMESPACE for the cluster.

Total : suite reduces (max(deploy nsmgr time, deploy forwarder time) + max(cleanup forwarder time, cleanup nsmgr time))
x 3

NSM PODs are forwarder and nsmgr.

Bugs which has been found by testing suites on CI

#2007
#1898
#1895
#1914
...

PRs

First implementation:

1. NSM Test suites #1861

After splitting at parts:

1. Cloudtest improvements cloudtest#3 -- MERGED
2. Test NSM Suites: Update cloudtest tool, split executions #1 #2057 -- MERGED
3. Test NSM Suites: Improve artifacts storing on CI #2 #2042 -- MERGED
4. Test NSM Suites: Add suites on CI #3 #2061 -- Fixing bugs