config-linux: allow empty strings in memory policy nodes field

When runtime-tools validator checks mandatory fields, it expects every
string field either to be tagged "omitempty" or contain a non-empty
string. Linux memory policy modes MPOL_DEFAULT and MPOL_LOCAL must
have empty nodes field. This change adds "omitempty" tag to
LinuxMemoryPolicy.Nodes in order to pass runtime-tools validation in
these modes.

Signed-off-by: Antti Kervinen <[email protected]>

Author: askervin

specs-go/config.go

@@ -899,7 +899,7 @@ type LinuxMemoryPolicy struct {
 
 	// Nodes representing the nodemask for the set_mempolicy syscall in comma separated ranges format.
 	// Format: "<node0>-<node1>,<node2>,<node3>-<node4>,..."
-	Nodes string `json:"nodes"`
+	Nodes string `json:"nodes,omitempty"`
 
 	// Flags for the set_mempolicy syscall.
 	Flags []MemoryPolicyFlagType `json:"flags,omitempty"`