feat(deps): adopt flatten plugin and google-cloud-shared-dependencies (#162)

Author: yangnuoyu

.gitignore

@@ -39,4 +39,6 @@ api_key
 
 # Python utilities
 *.pyc
-artman-genfiles
+artman-genfiles
+
+.flattened-pom.xml

pom.xml

@@ -76,6 +76,13 @@
         <type>pom</type>
         <scope>import</scope>
       </dependency>
+      <dependency>
+        <groupId>com.google.cloud</groupId>
+        <artifactId>google-cloud-shared-dependencies</artifactId>
+        <version>0.8.1</version>
+        <type>pom</type>
+        <scope>import</scope>
+      </dependency>
     </dependencies>
   </dependencyManagement>
   <dependencies>
@@ -106,10 +113,6 @@
         </exclusion>
       </exclusions>
     </dependency>
-    <dependency>
-      <groupId>com.google.api.grpc</groupId>
-      <artifactId>proto-google-cloud-spanner-v1</artifactId>
-    </dependency>
     <dependency>
       <groupId>com.google.protobuf</groupId>
       <artifactId>protobuf-java</artifactId>
@@ -121,7 +124,6 @@
     <dependency>
       <groupId>org.threeten</groupId>
       <artifactId>threetenbp</artifactId>
-      <version>${threeten.version}</version>
     </dependency>
     <dependency>
       <groupId>io.grpc</groupId>
@@ -134,7 +136,6 @@
     <dependency>
       <groupId>com.google.code.findbugs</groupId>
       <artifactId>jsr305</artifactId>
-      <version>${findbugs.version}</version>
     </dependency>
     <dependency>
       <groupId>com.google.http-client</groupId>
@@ -333,6 +334,11 @@
           </execution>
         </executions>
       </plugin>
+
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>flatten-maven-plugin</artifactId>
+      </plugin>
     </plugins>
     <pluginManagement>
       <plugins>
@@ -453,7 +459,7 @@
             <link>https://developers.google.com/protocol-buffers/docs/reference/java/</link>
             <link>https://googleapis.dev/java/google-auth-library/latest/</link>
             <link>https://googleapis.dev/java/gax/latest/</link>
-            <link>https://googleapis.github.io/api-common-java/${google.api-common.version}/apidocs/</link>
+            <link>https://googleapis.github.io/api-common-java/</link>
           </links>
         </configuration>
       </plugin>