feat: declare REBOOT_SETTLE_SECONDS = 90

A general-purpose host runs through a full init sequence before it is worth
polling again. netOrk kept this in a hardcoded driver-name set duplicated across
two files (netork#113).

Worth knowing: the NAS drivers that inherit from here — OpenMediaVault and QNAP
— were not in that set and waited 45 seconds. They inherit 90 now, which is the
more honest number for a device that also brings storage up on boot.

napalm_linux/linux.py

@@ -126,6 +126,9 @@ class LinuxDriver(OSDriver):
     TYPE_LABEL = "Linux"
     VENDOR = "Linux"
     DRIVER_NAME = "linux"
+    # A general-purpose host runs through a full init sequence; NAS derivatives
+    # (OpenMediaVault, QNAP) inherit this and are, if anything, slower.
+    REBOOT_SETTLE_SECONDS = 90
     SNMP_FINGERPRINT = [
         FingerprintRule("linux", weight=5.0),
     ]