CBLT-252:  use env.vars: MAVEN_UPLOAD_USERNAME, MAVEN_UPLOAD_PASSWORD, MAVEN_UPLOAD_VERSION, MAVEN_UPLOAD_REPO_URL
CBLT-252:  use env.vars: MAVEN_UPLOAD_USERNAME, MAVEN_UPLOAD_PASSWORD, MAVEN_UPLOAD_VERSION, MAVEN_UPLOAD_REPO_URL

Change-Id: I95b888fa4a834afb7b0e71dadfa32f094e872175

deleet/couchbase-lite-java-core,mariosotil/couchbase-lite-java-core,mariosotil/couchbase-lite-java-core,netsense-sas/couchbase-lite-java-core,couchbase/couchbase-lite-java-core,mariosotil/couchbase-lite-java-core,Spotme/couchbase-lite-java-core,gotmyjobs/couchbase-lite-java-core,4u7/couchbase-lite-java-core