Bump neo4j-java-driver from 1.7.2 to 1.7.3 in /modules/neo4j (#1297)

Bumps [neo4j-java-driver](https://github.com/neo4j/neo4j-java-driver) from 1.7.2 to 1.7.3.
<details>
<summary>Commits</summary>

- [`742d280`](neo4j/neo4j-java-driver@742d280) Merge pull request [#567](https://github-redirect.dependabot.com/neo4j/neo4j-java-driver/issues/567) from ali-ince/1.7-pass-access-mode
- [`49ef4db`](neo4j/neo4j-java-driver@49ef4db) Fixing wrong file header
- [`f66e194`](neo4j/neo4j-java-driver@f66e194) Merge pull request [#570](https://github-redirect.dependabot.com/neo4j/neo4j-java-driver/issues/570) from zhenlineo/1.7-flaky-test
- [`5b58956`](neo4j/neo4j-java-driver@5b58956) Fixing the flaky test that is caused by certificate file changes.
- [`f9a6fca`](neo4j/neo4j-java-driver@f9a6fca) Merge pull request [#569](https://github-redirect.dependabot.com/neo4j/neo4j-java-driver/issues/569) from michael-simons/fix-java-doc-trust-strategy
- [`bc68f0f`](neo4j/neo4j-java-driver@bc68f0f) Merge pull request [#566](https://github-redirect.dependabot.com/neo4j/neo4j-java-driver/issues/566) from zhenlineo/1.7-hostname-for-sni
- [`41949fc`](neo4j/neo4j-java-driver@41949fc) Fix JavaDoc of withTrustStrategy.
- [`227c0fc`](neo4j/neo4j-java-driver@227c0fc) Fix test failure
- [`11345c1`](neo4j/neo4j-java-driver@11345c1) Pass access mode as part of statement metadata
- [`e9e5a93`](neo4j/neo4j-java-driver@e9e5a93) Fix some test failures due to changes to routing table procedure on read-repl...
- Additional commits viewable in [compare view](neo4j/neo4j-java-driver@1.7.2...1.7.3)
</details>
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modules/neo4j/build.gradle

@@ -29,6 +29,6 @@ dependencies {
 
     compile project(":testcontainers")
 
-    testCompile "org.neo4j.driver:neo4j-java-driver:1.7.2"
+    testCompile "org.neo4j.driver:neo4j-java-driver:1.7.3"
     testCompile 'org.assertj:assertj-core:3.12.1'
 }