Prepare 2.7.21 Release

Change-Id: I756814bf4aa9f63fca656e4e8067d3caac6fb9ff
Reviewed-on: http://review.couchbase.org/c/couchbase-java-client/+/161459
Tested-by: Michael Nitschinger <michael.nitschinger@couchbase.com>
Reviewed-by: Michael Nitschinger <michael.nitschinger@couchbase.com>

Author: daschl

README.md

@@ -26,7 +26,7 @@ The easiest way is to download the jar as well as its transitive dependencies (o
 <dependency>
     <groupId>com.couchbase.client</groupId>
     <artifactId>java-client</artifactId>
-    <version>2.7.20</version>
+    <version>2.7.21</version>
 </dependency>
 ```
 

pom.xml

@@ -16,7 +16,7 @@
 
     <groupId>com.couchbase.client</groupId>
     <artifactId>java-client</artifactId>
-    <version>2.7.21-SNAPSHOT</version>
+    <version>2.7.21</version>
     <packaging>bundle</packaging>
 
     <name>Couchbase Java SDK</name>
@@ -28,7 +28,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 
-        <core.version>1.7.21-SNAPSHOT</core.version>
+        <core.version>1.7.21</core.version>
         <junit.version>4.12</junit.version>
         <mockito.version>1.10.19</mockito.version>
         <slf4j.version>1.7.7</slf4j.version>