Specify default value for trimFactor range option

This is temporary until sparsity and trimFactor are made optional prior to the GA release for range indexes (PHPC-2403)

Author: jmikola

tests/clientEncryption/clientEncryption-encryptExpression-001.phpt

@@ -25,7 +25,7 @@ $encryptOpts = [
     'algorithm' => MongoDB\Driver\ClientEncryption::ALGORITHM_RANGE,
     'queryType' => MongoDB\Driver\ClientEncryption::QUERY_TYPE_RANGE,
     'contentionFactor' => 0,
-    'rangeOpts' => ['min' => 0, 'max' => 200, 'sparsity' => 1],
+    'rangeOpts' => ['min' => 0, 'max' => 200, 'sparsity' => 1, 'trimFactor' => 1],
 ];
 
 $expr = [

tests/clientEncryption/clientEncryption-encryptExpression_error-002.phpt

@@ -25,7 +25,7 @@ $encryptOpts = [
     'algorithm' => MongoDB\Driver\ClientEncryption::ALGORITHM_RANGE,
     'queryType' => MongoDB\Driver\ClientEncryption::QUERY_TYPE_RANGE,
     'contentionFactor' => 0,
-    'rangeOpts' => ['min' => 0, 'max' => 200, 'sparsity' => 1],
+    'rangeOpts' => ['min' => 0, 'max' => 200, 'sparsity' => 1, 'trimFactor' => 1],
 ];
 
 echo throws(function() use ($clientEncryption, $encryptOpts) {