Revert "CLOUDSTACK-7408: Fixed - Private key of the ssh keypair was getting corrupted"

This reverts commit e921ec6ec79c50096d58264d60c15091969ff888.

CLOUDSTACK-7408: sshClient.py - removing function load_host_keys(). This function is used to load host keys from local host keys file and to save back the host key. It is not needed while running test cases because we are connecting to unknown host anyway and don't want to use any local host key file. We have the AutoAddPolicy for missing host key file, hence whenever ssh connects to a new host, it will save the host key in memory temporarily.

Signed-off-by: SrikanteswaraRao Talluri <talluri@apache.org>
CLOUDSTACK-7805: test_vpc_vms_deployment.py - Removing invalid steps from test case

Signed-off-by: SrikanteswaraRao Talluri <talluri@apache.org>
CLOUDSTACK-7802: test_vpc_network.py - Increasing polling period for network state check

Signed-off-by: SrikanteswaraRao Talluri <talluri@apache.org>
CLOUDSTACK-7801: test_volumes.py - Fixed import and pep8 issues

Signed-off-by: SrikanteswaraRao Talluri <talluri@apache.org>
CLOUDSTACK-7685: Fixed copy template method call in test_escalations_template.py. Removed unbound method of the same name as bound method from base library and changed method call accordingly

Signed-off-by: SrikanteswaraRao Talluri <talluri@apache.org>
CLOUDSTACK-7682: Fixed usage event issue. Used api client of account for which we are checking the usage

Signed-off-by: SrikanteswaraRao Talluri <talluri@apache.org>
CLOUDSTACK-7684: Fixed Exception not raised issue in secondary storage limits test suite test_ss_max_limits.py

Signed-off-by: SrikanteswaraRao Talluri <talluri@apache.org>
CLOUDSTACK-7691: Fixed 'Exception not raised' issue in test_project_limits.py

Signed-off-by: SrikanteswaraRao Talluri <talluri@apache.org>
CLOUDSTACK-7692: Fixed template register issue in test_project_usage.py

Signed-off-by: SrikanteswaraRao Talluri <talluri@apache.org>
CLOUDSTACK-7728: Test script to identify product issue

Signed-off-by: SrikanteswaraRao Talluri <talluri@apache.org>