Increased wait time before I/O with the child process. Reason: Reduce the chance of false Fail results.

TestChild/testChild.cpp

@@ -1718,7 +1718,7 @@ bool testChildNonBlockingReadWrite1() {
       RETURN_FALSE("  writeAndShrink() failure");
     }
 
-    std::this_thread::sleep_for(std::chrono::milliseconds(25));
+    std::this_thread::sleep_for(std::chrono::milliseconds(100));
 
     int expectedLeftOver = output.size();
 
@@ -1933,7 +1933,7 @@ bool testChildVectorReadWrite() {
       RETURN_FALSE("  writeAndShrink() failure");
     }
 
-    std::this_thread::sleep_for(std::chrono::milliseconds(50));
+    std::this_thread::sleep_for(std::chrono::milliseconds(100));
 
     if (child.read(readBuf) != nExpectedBytes) {
       RETURN_FALSE("  read() failure");
@@ -2076,7 +2076,7 @@ bool testChildReadDelimited() {
       RETURN_FALSE("  write() failure");
     }
 
-    std::this_thread::sleep_for(std::chrono::milliseconds(50));
+    std::this_thread::sleep_for(std::chrono::milliseconds(100));
     
     // Check
     std::vector<char> delimVec = {'E'};