Cellular: EasyCellularConnection::connect doesn't have any check that "CellularConnectionFSM" object is created or not

[mudassar-ublox]

Description

EasyCellularConnection::connect doesn't have any check that "CellularConnectionFSM" object is created or not resulting into Hard Fault Handler. Instead of calling "_cellularConnectionFSM->set_sim_pin" method call "EasyCellularConnection::set_sim_pin" method. Which will create object of "CellularConnectionFSM" first, if not created already, and then set sim pin.

Pull request type

[x] Fix
[ ] Refactor
[ ] New target
[ ] Feature
[ ] Breaking change

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Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/7359/

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Test logs :http://mbed-os-logs.s3-website-us-west-1.amazonaws.com/?prefix=logs/7359/2245

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