RFR: 8290368: Introduce LDAP and RMI protocol-specific object factory filters to JNDI implementation

[Aleksei Efimov]

### Summary of the change
This change introduces new system and security properties for specifying factory filters for the JNDI/LDAP and the JNDI/RMI JDK provider implementations. 

These new properties allow more granular control over the set of object factories allowed to reconstruct Java objects from LDAP and RMI contexts.

The new factory filters are supplementing the existing `jdk.jndi.object.factoriesFilter` global factories filter to determine if a specific object factory is permitted to instantiate objects for the given protocol.

Links:

- [CSR with details](https://bugs.openjdk.org/browse/JDK-8291556)
- [JBS issue](https://bugs.openjdk.org/browse/JDK-8290368)

### List of code changes

- Implementation for two new system and security properties have been added to the `com.sun.naming.internal.ObjectFactoriesFilter` class
- `java.security` and `module-info.java` files have been updated with a documentation for the new properties
- To keep API of `javax.naming.spi.NamingManager` and `javax.naming.spi.DirectoryManager` classes unmodified a new internal `com.sun.naming.internal.NamingManagerHelper` class has been introduced. All  `getObjectInstance` calls have been updated to use the new helper class.

#### NamingManagerHelper changes
Changes performed to construct the `NamingManagerHelper` class:
- `DirectoryManager.getObjectInstance` -> `NamingManagerHelper.getDirObjectInstance`. Dependant methods were also moved to the `NamingManagerHelper` class
- `NamingManager.getObjectInstance` -> `NamingManagerHelper.getObjectInstance`. Methods responsible for setting/getting object factory builder were moved to the `NamingManagerHelper` class too.


### Test changes
New tests have been added for checking that new factory filters can be used to restrict reconstruction of Java objects from LDAP and RMI contexts:
- LDAP protocol specific test: test/jdk/com/sun/jndi/ldap/objects/factory/LdapFactoriesFilterTest.java
- RMI protocol specific test: test/jdk/com/sun/jndi/rmi/registry/objects/RmiFactoriesFilterTest.java
Existing `test/jdk/javax/naming/module/RunBasic.java` test has been updated to allow test-specific factories filter used to reconstruct objects from the test LDAP server. 

### Testing
tier1-tier3 and JNDI regression/JCK tests not showing any failures related to this change.
No failures observed for the modified regression tests.

-------------

Commit messages:
 - Additional comments/formatting cleanup.
 - More tests clean-up. Code/doc comments cleanup.
 - Cleanup test comments. Add tests to check that LDAP/RMI filters do not intersect.
 - 8290368: Introduce LDAP and RMI protocol-specific object factory filters to JNDI implementation

Changes: https://git.openjdk.org/jdk/pull/10578/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10578&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8290368
  Stats: 1446 lines in 22 files changed: 1099 ins; 303 del; 44 mod
  Patch: https://git.openjdk.org/jdk/pull/10578.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10578/head:pull/10578

PR: https://git.openjdk.org/jdk/pull/10578