Avoid possible serialization issues related to ArraySeq

The ArraySeq class has been known to cause deserialization failures
related to saving/reloading parsers because the class is written in a
way as to cause serialization sensitivity to changes in the class.

We don't use ArraySeq in any of our serialized classes, but Scala
implements varargs using ArraySeq, and we do use varargs in the
serialized CompiledDPath class. This can make serialized objects
sensitive to different versions of Scala if they make changes to the
class.

We do not need any of the features provided by ArraySeq or varargs, so
this converts the ops member of CompiledDPath to an Array, avoiding
potential deserialzation issues with future versions of Daffodil.

DAFFODIL-3073

Author: stevedlawrence

daffodil-core/src/main/scala/org/apache/daffodil/runtime1/dpath/DPathRuntime.scala

@@ -17,7 +17,6 @@
 
 package org.apache.daffodil.runtime1.dpath
 
-import scala.collection.immutable.ArraySeq
 import scala.xml.NodeSeq.seqToNodeSeq
 
 import org.apache.daffodil.lib.exceptions.Assert
@@ -42,9 +41,10 @@ import org.apache.daffodil.runtime1.processors.VariableException
 import org.apache.daffodil.runtime1.processors.VariableHasNoValue
 import org.apache.daffodil.runtime1.processors.VariableRuntimeData
 
-class CompiledDPath(val ops: RecipeOp*) extends Serializable {
+class CompiledDPath(val ops: Array[RecipeOp]) extends Serializable {
 
-  def this(ops: List[RecipeOp]) = this(ArraySeq.unsafeWrapArray(ops.toArray)*)
+  def this(ops: RecipeOp*) = this(ops.toArray)
+  def this(ops: List[RecipeOp]) = this(ops.toArray)
 
   override def toString =
     toXML.toString