Multi FS Support

- Reviving PR 191, to make FileSystem creation off actual path
 - Streamline all filesystem access to HoodieTableMetaClient
 - Hadoop Conf from Spark Context serialized & passed to executor code too
 - Pick up env vars prefixed with HOODIE_ENV_ into Configuration object
 - Cleanup usage of FSUtils.getFS, piggybacking off HoodieTableMetaClient.getFS
 - Adding s3a to supported schemes & support escaping "." in env vars
 - Tests use HoodieTestUtils.getDefaultHadoopConf

hoodie-hive/src/main/java/com/uber/hoodie/hive/HiveSyncTool.java

@@ -30,6 +30,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.Optional;
 import java.util.stream.Collectors;
+import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.hive.conf.HiveConf;
 import org.apache.hadoop.hive.metastore.api.Partition;
@@ -183,7 +184,7 @@ public class HiveSyncTool {
       cmd.usage();
       System.exit(1);
     }
-    FileSystem fs = FSUtils.getFs();
+    FileSystem fs = FSUtils.getFs(cfg.basePath, new Configuration());
     HiveConf hiveConf = new HiveConf();
     hiveConf.addResource(fs.getConf());
     new HiveSyncTool(cfg, hiveConf, fs).syncHoodieTable();

hoodie-hive/src/main/java/com/uber/hoodie/hive/HoodieHiveClient.java

@@ -91,7 +91,7 @@ public class HoodieHiveClient {
   HoodieHiveClient(HiveSyncConfig cfg, HiveConf configuration, FileSystem fs) {
     this.syncConfig = cfg;
     this.fs = fs;
-    this.metaClient = new HoodieTableMetaClient(fs, cfg.basePath, true);
+    this.metaClient = new HoodieTableMetaClient(fs.getConf(), cfg.basePath, true);
     this.tableType = metaClient.getTableType();
 
     LOG.info("Creating hive connection " + cfg.jdbcUrl);