Increase parallel connection limit for iOS

Default number of parallel connection per host
is 6 for hardware iOS device. This limits the
speed of network stages of map download
and map update.
Increase this limit to 32 connections.

Relates-To: HERESDK-5947
Signed-off-by: Mykhailo Diachenko <ext-mykhailo.z.diachenko@here.com>

Author: diachenko-mischa

olp-cpp-sdk-core/src/http/ios/OLPHttpClient.mm

@@ -31,6 +31,7 @@
 
 namespace {
 constexpr auto kLogTag = "OLPHttpClient";
+constexpr auto kMaximumConnectionPerHost = 32;
 
 using SessionId = std::uint64_t;
 static SessionId sessionIdCounter_ = std::numeric_limits<SessionId>::min() + 1;
@@ -60,7 +61,7 @@ void OnExitBackground() override {
 
 }  // namespace
 
-@interface OLPHttpClient ()<NSURLSessionDataDelegate>
+@interface OLPHttpClient () <NSURLSessionDataDelegate>
 
 @property(nonatomic) NSMutableDictionary* tasks;
 
@@ -673,6 +674,8 @@ - (NSURLSession*)urlSessionWithProxy:(NSDictionary*)proxyDict
     config = [NSURLSessionConfiguration ephemeralSessionConfiguration];
   }
 
+  config.HTTPMaximumConnectionsPerHost = kMaximumConnectionPerHost;
+
   if (proxyDict) {
     config.connectionProxyDictionary = proxyDict;
   }