fix: remove dependency on google-cloud-bigquery (cyclic dep) (#1295)

Fixes #1249

.kokoro/dependencies.sh

@@ -47,11 +47,11 @@ function completenessCheck() {
   # This is stripped from the output as it is not present in the flattened pom.
   # Only dependencies with 'compile' or 'runtime' scope are included from original dependency list.
   msg "Generating dependency list using original pom..."
-  mvn dependency:list -f pom.xml -DincludeScope=runtime -Dsort=true | grep '\[INFO]    .*:.*:.*:.*:.*' | sed -e 's/ --.*//' >.org-list.txt
+  mvn dependency:list -f pom.xml -DincludeScope=runtime -DexcludeArtifactIds=gson,commons-codec,commons-logging,opencensus-contrib-http-util,httpclient,httpcore -Dsort=true | grep '\[INFO]    .*:.*:.*:.*:.*' | sed -e 's/ --.*//' >.org-list.txt
 
   # Output dep list generated using the flattened pom (only 'compile' and 'runtime' scopes)
   msg "Generating dependency list using flattened pom..."
-  mvn dependency:list -f .flattened-pom.xml -DincludeScope=runtime -Dsort=true | grep '\[INFO]    .*:.*:.*:.*:.*' >.new-list.txt
+  mvn dependency:list -f .flattened-pom.xml -DincludeScope=runtime -DexcludeArtifactIds=gson,commons-codec,commons-logging,opencensus-contrib-http-util,httpclient,httpcore -Dsort=true | grep '\[INFO]    .*:.*:.*:.*:.*' >.new-list.txt
 
   # Compare two dependency lists
   msg "Comparing dependency lists..."

google-cloud-bigquerystorage/clirr-ignored-differences.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- see http://www.mojohaus.org/clirr-maven-plugin/examples/ignored-differences.html -->
+<differences>
+  <difference>
+    <differenceType>8001</differenceType>
+    <className>com/google/cloud/bigquery/storage/v1beta2/BQV2ToBQStorageConverter</className>
+    <method>com.google.cloud.bigquery.storage.v1beta2.BQV2ToBQStorageConverter</method>
+  </difference>
+  <difference>
+    <differenceType>8001</differenceType>
+    <className>com/google/cloud/bigquery/storage/v1beta2/SchemaCompatibility</className>
+    <method>com.google.cloud.bigquery.storage.v1beta2.SchemaCompatibility</method>
+  </difference>
+  <difference>
+    <differenceType>7002</differenceType>
+    <className>com/google/cloud/bigquery/storage/v1beta2/JsonStreamWriter</className>
+    <method>com.google.cloud.bigquery.storage.v1beta2.JsonStreamWriter$Builder newBuilder(java.lang.String, com.google.cloud.bigquery.Schema)</method>
+  </difference>
+</differences>

google-cloud-bigquerystorage/pom.xml

@@ -146,6 +146,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-bigquery</artifactId>
+      <scope>test</scope>
     </dependency>
     <dependency>
       <groupId>com.google.code.findbugs</groupId>

google-cloud-bigquerystorage/src/main/java/com/google/cloud/bigquery/storage/v1beta2/JsonStreamWriter.java

@@ -19,7 +19,6 @@
 import com.google.api.gax.batching.FlowControlSettings;
 import com.google.api.gax.core.CredentialsProvider;
 import com.google.api.gax.rpc.TransportChannelProvider;
-import com.google.cloud.bigquery.Schema;
 import com.google.common.base.Preconditions;
 import com.google.protobuf.Descriptors;
 import com.google.protobuf.Descriptors.Descriptor;
@@ -202,23 +201,6 @@ public static Builder newBuilder(String streamOrTableName, TableSchema tableSche
     return new Builder(streamOrTableName, tableSchema, null);
   }
 
-  /**
-   * newBuilder that constructs a JsonStreamWriter builder with BigQuery client being initialized by
-   * StreamWriter by default.
-   *
-   * @param streamOrTableName name of the stream that must follow
-   *     "projects/[^/]+/datasets/[^/]+/tables/[^/]+/streams/[^/]+"
-   * @param tableSchema The schema of the table when the stream was created, which is passed back
-   *     through {@code WriteStream}
-   * @return Builder
-   */
-  public static Builder newBuilder(String streamOrTableName, Schema tableSchema) {
-    Preconditions.checkNotNull(streamOrTableName, "StreamOrTableName is null.");
-    Preconditions.checkNotNull(tableSchema, "TableSchema is null.");
-    return new Builder(
-        streamOrTableName, BQV2ToBQStorageConverter.ConvertTableSchema(tableSchema), null);
-  }
-
   /**
    * newBuilder that constructs a JsonStreamWriter builder.
    *