Change sleepycat.je dependency to a something available in Maven Central

[patduin]

Hi, minor issue and there is some background in this issue: https://github.com/odpi/egeria/issues/1116

It would be helpful (if possible) to bump the sleepycat.je dependency to something that's available in Maven Central so downstream projects don't have to add the Oracle repository.

[planetf1]

As @patduin mentioned we came across this in the build of ODPi Egeria

In our case the dependency tree from mvn dependency:tree is

[INFO] org.odpi.egeria:graph-repository-connector:jar:1.1-SNAPSHOT
[INFO] +- org.janusgraph:janusgraph-berkeleyje:jar:0.3.1:compile
[INFO] |  \- com.sleepycat:je:jar:7.4.5:compile

We are using berkeley as the backing store in a simple test environment (ootb) for our graph. We only express a dependency on 0.3.1 & don't explicitly refer to sleepycat version

The additional repo is being pulled in my the repository definition in the org.janusgraph:janusgraph-berkeleyje pom ie from https://search.maven.org/artifact/org.janusgraph/janusgraph-berkeleyje/0.3.1/jar

<repositories>
        <repository>
            <id>oracleReleases</id>
            <name>Oracle Released Java Packages</name>
            <url>http://download.oracle.com/maven</url>
            <layout>default</layout>
        </repository>
    </repositories>

In @patduins case the enterprise had the maven central repo, but no access to the Oracle repo.

With sleepycat now on maven central ie the latest at https://search.maven.org/artifact/com.sleepycat/je/18.3.12/jar perhaps now would be a good time to consider switching and benefit from dropping this additional repo