New way to bootstrap (#2516)

* Updating ulimit

* Updating node-exporter version

Signed-off-by: Rajesh Rajendran <rajesh.r@optit.co>

* Removing deprecated swarm bootstrap.

Signed-off-by: Rajesh Rajendran <rajesh.r@optit.co>

* Installing nodeexporter as part of bootstrapping.

Signed-off-by: Rajesh Rajendran <rajesh.r@optit.co>

* Ignoring unreachable nodes

Signed-off-by: Rajesh Rajendran <rajesh.r@optit.co>

* Idempotent package installation.

Signed-off-by: Rajesh Rajendran <rajesh.r@optit.co>

* Changing tag name to general template.

Signed-off-by: Rajesh Rajendran <rajesh.r@optit.co>

* Removing unnecessary operations and vars

* fix: ansible syntax fix

Co-authored-by: Rajesh Rajendran <rajesh.r@optit.co>