Improve IAST sampling defaults

Author: smola

dd-trace-api/src/main/java/datadog/trace/api/ConfigDefaults.java

@@ -110,9 +110,9 @@ public final class ConfigDefaults {
   static final int DEFAULT_APPSEC_MAX_STACK_TRACE_DEPTH = 32;
   static final String DEFAULT_IAST_ENABLED = "false";
   static final boolean DEFAULT_IAST_DEBUG_ENABLED = false;
-  public static final int DEFAULT_IAST_MAX_CONCURRENT_REQUESTS = 4;
+  public static final int DEFAULT_IAST_MAX_CONCURRENT_REQUESTS = 1;
   public static final int DEFAULT_IAST_VULNERABILITIES_PER_REQUEST = 2;
-  public static final int DEFAULT_IAST_REQUEST_SAMPLING = 33;
+  public static final int DEFAULT_IAST_REQUEST_SAMPLING = 100;
   static final Set<String> DEFAULT_IAST_WEAK_HASH_ALGORITHMS =
       new HashSet<>(asList("SHA1", "SHA-1", "MD2", "MD5", "RIPEMD128", "MD4"));
   static final String DEFAULT_IAST_WEAK_CIPHER_ALGORITHMS =