data rest crud, angular fe (#1199)

* data rest crud, angular fe

* fix formatting, remove extra imports

* fix config

* change student entity to employee

* expose ids

* update boot version, removes ids, check null id

spring-rest-angular/src/main/resources/db/sql/employees.sql

@@ -0,0 +1,16 @@
+CREATE TABLE employee (
+  id   INTEGER PRIMARY KEY,
+  name VARCHAR(30),
+  age INTEGER
+);
+
+INSERT INTO employee (id,name,age) 
+VALUES (1,'Bryan',20);
+INSERT INTO employee (id,name,age) 
+VALUES (2,'Lisa',30);
+INSERT INTO employee (id,name,age) 
+VALUES (3,'Laura',40);
+INSERT INTO employee (id,name,age) 
+VALUES (4,'Alex',35);
+INSERT INTO employee (id,name,age) 
+VALUES (5,'John',47);