Allow specifying limits for pipeline steps from server config (#2085)

model/resource_limit.go

@@ -0,0 +1,11 @@
+package model
+
+// ResourceLimit is the resource limit to set on pipeline steps
+type ResourceLimit struct {
+	MemSwapLimit int64
+	MemLimit     int64
+	ShmSize      int64
+	CPUQuota     int64
+	CPUShares    int64
+	CPUSet       string
+}