Switch Maven deploy to use new recommended method

pom.xml

@@ -2,12 +2,6 @@
 <project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
 			xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
 
-	<parent>
-		<groupId>org.sonatype.oss</groupId>
-		<artifactId>oss-parent</artifactId>
-		<version>9</version>
-	</parent>
-
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>ca.uhn.hapi.fhir</groupId>
 	<artifactId>hapi-fhir</artifactId>
@@ -29,6 +23,10 @@
 	</issueManagement>
 
 	<distributionManagement>
+		<snapshotRepository>
+			<id>ossrh</id>
+			<url>https://oss.sonatype.org/content/repositories/snapshots</url>
+		</snapshotRepository>
 		<site>
 			<id>git.server</id>
 			<url>scm:git:git@github.com:jamesagnew/hapi-fhir.git</url>
@@ -1124,6 +1122,17 @@
 	<build>
 		<pluginManagement>
 			<plugins>
+				<plugin>
+					<groupId>org.sonatype.plugins</groupId>
+					<artifactId>nexus-staging-maven-plugin</artifactId>
+					<version>1.6.8</version>
+					<extensions>true</extensions>
+					<configuration>
+						<serverId>ossrh</serverId>
+						<nexusUrl>https://oss.sonatype.org/</nexusUrl>
+						<autoReleaseAfterClose>true</autoReleaseAfterClose>
+					</configuration>
+				</plugin>
 				<plugin>
 					<groupId>com.gemnasium</groupId>
 					<artifactId>gemnasium-maven-plugin</artifactId>