[Globals]: add copy c-tor and copy operator (#585)

: copy constructor added to be explicit as needed by C++17 and later

Author: ai-mannamalai

include/CXXGraph/Partitioning/Utility/Globals.hpp

@@ -39,6 +39,31 @@ class Globals {
       const double param1 = 1, const double param2 = 1, const double param3 = 1,
       const unsigned int threads = std::thread::hardware_concurrency());
   ~Globals();
+  Globals(const Globals& that) {
+    numberOfPartition = that.numberOfPartition;  // number of partitions
+    partitionStategy = that.partitionStategy;
+    threads = that.threads;
+    param1 = that.param1;
+    param2 = that.param2;
+    param3 = that.param3;
+
+    edgeCardinality = that.edgeCardinality;
+    vertexCardinality = that.vertexCardinality;
+    edgeAnalyzed = that.edgeAnalyzed;
+  };
+  Globals& operator=(const Globals& that) {
+    numberOfPartition = that.numberOfPartition;  // number of partitions
+    partitionStategy = that.partitionStategy;
+    threads = that.threads;
+    param1 = that.param1;
+    param2 = that.param2;
+    param3 = that.param3;
+
+    edgeCardinality = that.edgeCardinality;
+    vertexCardinality = that.vertexCardinality;
+    edgeAnalyzed = that.edgeAnalyzed;
+    return *this;
+  }
 
   const std::string print() const;