fix Thumbprint based on login for multi vCenter deployment

[divyenpatel]

What this PR does / why we need it:
fix Thumbprint based on login for multi vCenter deployment

Which issue this PR fixes
fixes ##2823

Testing done:
Done.

Verified Creating PVC and Pod using following config on multi vCenter deployment

[Global]
cluster-distribution = "CSI-Vanilla"
csi-fetch-preferred-datastores-intervalinmin = 1
query-limit = 3
list-volume-threshold = 1

[VirtualCenter "VC-1-IP"]
insecure-flag = "true"
user = "Administrator@vsphere.local"
password = "PSPSh-2lv1Y-beHe"
port = "443"
thumbprint = "7F:81:BC:50:DB:AD:0C:9E:33:4A:75:57:92:5A:5A:FB:28:BD:D6:A5:2E:26:9A:DC:9B:02:8D:5C:A8:B4:D4:BC"
datacenters = "VSAN-DC"

[VirtualCenter "VC-2-IP"]
insecure-flag = "true"
user = "Administrator@vsphere.local"
password = "PSPSh-2lv1Y-beHe"
port = "443"
thumbprint = "47:BF:44:18:ED:22:C1:D0:61:59:7C:ED:24:39:C0:71:10:66:BC:66:A1:A8:C6:96:EE:43:21:43:F9:CA:BE:CE"
datacenters = "VSAN-DC"

[VirtualCenter "VC-3-IP"]
insecure-flag = "true"
user = "Administrator@vsphere.local"
password = "PSPSh-2lv1Y-beHe"
port = "443"
thumbprint = "98:4B:78:EC:1F:D3:9E:9D:F2:F1:7C:98:C3:0F:77:3F:59:7C:36:C2:E2:1B:14:7A:5B:BF:73:8A:97:84:9C:26"
datacenters = "VSAN-DC"

[Snapshot]
global-max-snapshots-per-block-volume = 3

[Labels]
topology-categories="k8s-zone" 

Special notes for your reviewer:

Release note:

fix Thumbprint based on login for multi vCenter deployment

[divyenpatel]

@chethanv28 I have updated testing done section on the PR.
Can you help merge this PR?

[chethanv28]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: chethanv28, divyenpatel

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[chethanv28]

/lgtm