Delay cm tool's query for data interface after connecting
Delay cm tool's query for data interface after connecting

The "cm data connect" script queries for the UP data interface without waiting
after initiating its connect, while the modem sometimes takes longer to finish
so that the query happens too early & fails. This fix adds a simple sleep 2,
which is fine in such cm script, a standalone app for testing. Other waiting
mechanism is an overkill.

Resolves: LE-14464
Change-Id: If162cd5312a063611097739db54bffef7d1f825d

legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af