Reverting core-lib-gcp back to the release version, 0.7.0.

This was caught in an overeager sed script

provider/indexer-gcp/pom.xml

@@ -25,7 +25,7 @@
         <dependency>
             <groupId>org.opengroup.osdu</groupId>
             <artifactId>core-lib-gcp</artifactId>
-            <version>0.7.1-SNAPSHOT</version>
+            <version>0.7.0</version>
         </dependency>
 
         <dependency>