chore: clean ups, narrow some access modifiers

Author: sighphyre

src/main/java/io/getunleash/streaming/FailoverStrategy.java

@@ -118,7 +118,7 @@ public String getMessage() {
         }
     }
 
-    public static final class NetworkEventError extends BaseFailEvent {
+    static final class NetworkEventError extends BaseFailEvent {
         public NetworkEventError(Instant occurredAt, String message) {
             super(occurredAt, message);
         }
@@ -129,7 +129,7 @@ public EventType getType() {
         }
     }
 
-    public static final class HttpStatusError extends BaseFailEvent {
+    static final class HttpStatusError extends BaseFailEvent {
         private final int statusCode;
 
         public HttpStatusError(Instant occurredAt, String message, int statusCode) {
@@ -147,7 +147,7 @@ public EventType getType() {
         }
     }
 
-    public static final class ServerEvent extends BaseFailEvent {
+    static final class ServerEvent extends BaseFailEvent {
         private final String event;
 
         public ServerEvent(Instant occurredAt, String message, String event) {

src/test/java/io/getunleash/streaming/FailoverStrategyTest.java

@@ -11,7 +11,7 @@
 class FailoverStrategyTest {
 
     @Test
-    void should_fail_immediately_on_server_hint_polling() {
+    void should_fail_immediately_on_server_requests_polling() {
         FailoverStrategy strategy = new FailoverStrategy(3, 5_000);
         ServerEvent event = new ServerEvent(Instant.now(), "Switch to polling", "polling");