EG-73 - Remove postgres dependency from the node and update docs (#5867)

build.gradle

@@ -98,7 +98,6 @@ buildscript {
     ext.jansi_version = '1.18'
     ext.hibernate_version = '5.4.3.Final'
     ext.h2_version = '1.4.199' // Update docs if renamed or removed.
-    ext.postgresql_version = '42.2.8'
     ext.rxjava_version = '1.3.8'
     ext.dokka_version = '0.9.17'
     ext.eddsa_version = '0.3.0'

docs/source/node-database.rst

@@ -15,7 +15,7 @@ The Corda continuous integration pipeline does not run unit tests or integration
 
 PostgreSQL
 ----------
-Nodes can also be configured to use PostgreSQL 9.6, using PostgreSQL JDBC Driver 42.1.4. Here is an example node
+Nodes can also be configured to use PostgreSQL 9.6, using PostgreSQL JDBC Driver 42.2.8. Here is an example node
 configuration for PostgreSQL:
 
 .. sourcecode:: groovy
@@ -45,6 +45,7 @@ Note that:
   .. sourcecode:: groovy
 
     CREATE SEQUENCE my_schema.hibernate_sequence INCREMENT BY 1 MINVALUE 1 MAXVALUE 9223372036854775807 START 8 CACHE 1 NO CYCLE;
+* The PostgreSQL JDBC database driver must be placed in the ``drivers`` directory in the node.
 
 SQLServer
 ---------

node/build.gradle

@@ -182,9 +182,6 @@ dependencies {
     // For H2 database support in persistence
     compile "com.h2database:h2:$h2_version"
 
-    // For Postgres database support in persistence
-    compile "org.postgresql:postgresql:$postgresql_version"
-
     // SQL connection pooling library
     compile "com.zaxxer:HikariCP:${hikari_version}"