vmm: setup hosts, hostname and resolv.conf files #698

Job	Run time
tests (vmm/sandbox, --all-features)	3m 34s
checks (vmm/sandbox, --all-features)	4m 48s
tests (vmm/task, --all-features)	2m 35s
checks (vmm/task, --all-features)	4m 15s
tests (shim, --all-features)	2m 50s
checks (shim, --all-features)	4m 3s
tests (quark, --all-features)	2m 25s
checks (quark, --all-features)	4m 20s
tests (runc, --all-features)	2m 33s
checks (runc, --all-features)	4m 12s
tests (wasm, --features=wasmedge, 0.11.2)	2m 44s
checks (wasm, --features=wasmedge, 0.11.2)	4m 35s
tests (wasm, --features=wasmtime)	3m 22s
checks (wasm, --features=wasmtime)	4m 34s
	50m 50s

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