Send cta text value when creating Blaze campaign

Author: JorgeMucientes

fluxc/src/main/java/org/wordpress/android/fluxc/model/blaze/BlazeCampaignCreationRequest.kt

@@ -12,6 +12,7 @@ data class BlazeCampaignCreationRequest(
     val paymentMethodId: String,
     val tagLine: String,
     val description: String,
+    val ctaText: String,
     val startDate: Date,
     val endDate: Date,
     val budget: BlazeCampaignCreationRequestBudget,

fluxc/src/main/java/org/wordpress/android/fluxc/network/rest/wpcom/blaze/BlazeCreationRestClient.kt

@@ -234,6 +234,7 @@ class BlazeCreationRestClient @Inject constructor(
             ),
             "site_name" to request.tagLine,
             "text_snippet" to request.description,
+            "cta_text" to request.ctaText,
             "target_url" to request.targetUrl,
             "url_params" to request.urlParams.entries.joinToString(separator = "&") { "${it.key}=${it.value}" },
             "main_image" to JsonObject().apply {