Jon/bigquery timestamp support (#27)

* Adding support for BigQuery timestamps without millisecond precision

* Setting jar manifest to the Apache Beam job

* Adding unit test for timestamp format

* Update pom.xml

Removing manifest configuration in pom.xml

Author: jontradesy

src/main/java/com/github/yuiskw/beam/TableRow2EntityFn.java

@@ -303,6 +303,7 @@ public static Instant parseTimestamp(String value) {
         "yyyy-M-d H:m:s.SSS z",
         "yyyy-M-d H:m:s.SS z",
         "yyyy-M-d H:m:s.S z",
+        "yyyy-M-d H:m:s z",
         "yyyy-M-d H:m:s.SSS",
         "yyyy-M-d H:m:s.SS",
         "yyyy-M-d H:m:s.S",

src/test/java/com/github/yuiskw/beam/TableRow2EntityFnTest.java

@@ -166,6 +166,7 @@ public void testIsTimestamp() {
     assertNotNull(TableRow2EntityFn.parseTimestamp("2017-9-1 4:1:1.1 UTC"));
     assertNotNull(TableRow2EntityFn.parseTimestamp("2017-9-1 4:1:1.12 UTC"));
     assertNotNull(TableRow2EntityFn.parseTimestamp("2017-9-1 4:1:1.001 UTC"));
+    assertNotNull(TableRow2EntityFn.parseTimestamp("2019-03-13 22:00:20 UTC"));
 
     assertNotNull(TableRow2EntityFn.parseTimestamp("2017-09-16 04:14:37.844 PST"));
     assertNotNull(TableRow2EntityFn.parseTimestamp("2017-09-16 04:14:37.844 JST"));