Use push microservice instead of doing push directly.

// FREEBIE

src/main/java/org/whispersystems/textsecuregcm/configuration/PushConfiguration.java

@@ -0,0 +1,40 @@
+package org.whispersystems.textsecuregcm.configuration;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import org.hibernate.validator.constraints.NotEmpty;
+
+import javax.validation.constraints.Min;
+
+public class PushConfiguration {
+  @JsonProperty
+  @NotEmpty
+  private String host;
+
+  @JsonProperty
+  @Min(1)
+  private int port;
+
+  @JsonProperty
+  @NotEmpty
+  private String username;
+
+  @JsonProperty
+  @NotEmpty
+  private String password;
+
+  public String getHost() {
+    return host;
+  }
+
+  public int getPort() {
+    return port;
+  }
+
+  public String getUsername() {
+    return username;
+  }
+
+  public String getPassword() {
+    return password;
+  }
+}