Remove java.util.HashMap wrappers - use Kotlin mapOf directly

Co-authored-by: bedaHovorka <5263405+bedaHovorka@users.noreply.github.com>

Author: Copilot

src/test/kotlin/cz/vutbr/fit/interlockSim/context/DefaultRailWayNetGridTest.kt

@@ -428,11 +428,11 @@ class DefaultRailWayNetGridTest {
 			val part1 = createTestTrackBlockPart()
 			val part2 = createTestTrackBlockPart()
 			val part3 = createTestTrackBlockPart()
-			val map = java.util.HashMap(mapOf(
+			val map = mapOf(
 				point1 to part1,
 				point2 to part2,
 				point3 to part3
-			))
+			)
 
 			// Act
 			grid.putMap(map)
@@ -453,11 +453,11 @@ class DefaultRailWayNetGridTest {
 			val part1 = createTestTrackBlockPart()
 			val part2 = createTestTrackBlockPart()
 			val part3 = createTestTrackBlockPart()
-			val map = java.util.HashMap(mapOf(
+			val map = mapOf(
 				point1 to part1,
 				point2 to part2,
 				point3 to part3
-			))
+			)
 
 			// Act
 			grid.putMap(map)
@@ -536,7 +536,7 @@ class DefaultRailWayNetGridTest {
 				Point(8, 8), Point(9, 9)
 			)
 			val parts = intermediatePoints.map { createTestTrackBlockPart() }
-			val map = java.util.HashMap(intermediatePoints.zip(parts).toMap())
+			val map = intermediatePoints.zip(parts).toMap()
 			grid.putMap(map)
 
 			// Act & Assert - all points should pass containsKey check
@@ -588,7 +588,7 @@ class DefaultRailWayNetGridTest {
 				Point(5, 5), Point(6, 6)
 			)
 			val parts = intermediatePoints.map { createTestTrackBlockPart() }
-			val map = java.util.HashMap(intermediatePoints.zip(parts).toMap())
+			val map = intermediatePoints.zip(parts).toMap()
 			grid.putMap(map)
 
 			// Act - remove all intermediate cells (simulates removeLine scenario)