vmm: setup hosts, hostname and resolv.conf files #683

Job	Run time
checks (vmm/sandbox, --all-features)	1m 38s
tests (vmm/sandbox, --all-features)	3m 10s
tests (vmm/task, --all-features)	3m 6s
checks (vmm/task, --all-features)	1m 52s
checks (shim, --all-features)	1m 54s
tests (shim, --all-features)	2m 40s
checks (quark, --all-features)	1m 52s
tests (quark, --all-features)	2m 27s
checks (wasm, --features=wasmedge, 0.11.2)	1m 54s
tests (wasm, --features=wasmedge, 0.11.2)	2m 44s
checks (wasm, --features=wasmtime)	1m 54s
tests (wasm, --features=wasmtime)	3m 24s
	28m 35s

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