fix: add spring-core to pom

oaipmh-core/pom.xml

@@ -7,7 +7,6 @@
 		<groupId>info.textgrid.middleware</groupId>
 		<version>4.3.0-SNAPSHOT</version>
 	</parent>
-	<groupId>info.textgrid.middleware</groupId>
 	<artifactId>oaipmh-core</artifactId>
 	<packaging>jar</packaging>
 	<name>DARIAHDE :: OAI-PMH DataProvider :: Core</name>
@@ -69,16 +68,16 @@
 			<version>${junit.version}</version>
 			<scope>test</scope>
 		</dependency>
-<!-- 		<dependency> -->
-<!-- 			<groupId>org.apache.logging.log4j</groupId> -->
-<!-- 			<artifactId>log4j-api</artifactId> -->
-<!-- 			<version>${log4j.version}</version> -->
-<!-- 		</dependency> -->
-<!-- 		<dependency> -->
-<!-- 			<groupId>org.apache.logging.log4j</groupId> -->
-<!-- 			<artifactId>log4j-core</artifactId> -->
-<!-- 			<version>${log4j.version}</version> -->
-<!-- 		</dependency> -->
+		<!-- <dependency> -->
+		<!-- <groupId>org.apache.logging.log4j</groupId> -->
+		<!-- <artifactId>log4j-api</artifactId> -->
+		<!-- <version>${log4j.version}</version> -->
+		<!-- </dependency> -->
+		<!-- <dependency> -->
+		<!-- <groupId>org.apache.logging.log4j</groupId> -->
+		<!-- <artifactId>log4j-core</artifactId> -->
+		<!-- <version>${log4j.version}</version> -->
+		<!-- </dependency> -->
 		<dependency>
 			<groupId>org.elasticsearch.client</groupId>
 			<artifactId>elasticsearch-rest-high-level-client</artifactId>
@@ -106,8 +105,13 @@
 			<version>${spring.version}</version>
 		</dependency>
 		<dependency>
-      <groupId>org.springframework</groupId>
-		  <artifactId>spring-context</artifactId>
+			<groupId>org.springframework</groupId>
+			<artifactId>spring-core</artifactId>
+			<version>${spring.version}</version>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework</groupId>
+			<artifactId>spring-context</artifactId>
 			<version>${spring.version}</version>
 		</dependency>
 		<!-- https://mvnrepository.com/artifact/com.thoughtworks.xstream/xstream -->