ResponseCache and CookieHandler reg tests need to be updated for generified APIs

Due to the -source 1.5 default compiler option change in B49, there are 4 networking regression tests failed during compilation since they are still extending from the non-generic old APIs of the abstract classes.

The 4 failed networking regression tests are:
java/net/ResponseCache/Test.java
java/net/ResponseCache/getResponseCode.java
java/net/ResponseCache/ResponseCacheTest.java
java/net/CookieHandler/CookieHandlerTest.java

=== TEST ERROR OUTPUT for Test ===
/net/luster/export/scratch/jsn_re/jdk/jdk1.5.0/ws/j2se/test/java/net/ResponseCac
he/Test.java:19: <anonymous Test$1> is not abstract and does not override abstra
ct method get(java.net.URI,java.lang.String,java.util.Map<java.lang.String,java.
util.List<java.lang.String>>) in java.net.ResponseCache
            public CacheRequest put(URI uri, URLConnection conn) throws IOException

=== TEST ERROR OUTPUT for getResponseCode ===
/net/luster/export/scratch/jsn_re/jdk/jdk1.5.0/ws/j2se/test/java/net/ResponseCac
he/getResponseCode.java:37: getResponseCode.MyResponseCache is not abstract and
does not override abstract method get(java.net.URI,java.lang.String,java.util.Ma
p<java.lang.String,java.util.List<java.lang.String>>) in java.net.ResponseCache
    static class MyResponseCache extends ResponseCache {
           ^
Note: /net/luster/export/scratch/jsn_re/jdk/jdk1.5.0/ws/j2se/test/java/net/Respo
nseCache/getResponseCode.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.

=== TEST ERROR OUTPUT for ResponseCacheTest ===
/net/luster/export/scratch/jsn_re/jdk/jdk1.5.0/ws/j2se/test/java/net/ResponseCac
he/ResponseCacheTest.java:136: ResponseCacheTest.MyResponseCache is not abstract
 and does not override abstract method get(java.net.URI,java.lang.String,java.ut
il.Map<java.lang.String,java.util.List<java.lang.String>>) in java.net.ResponseC
ache
    static class MyResponseCache extends ResponseCache {
           ^
Note: /net/luster/export/scratch/jsn_re/jdk/jdk1.5.0/ws/j2se/test/java/net/Respo
nseCache/ResponseCacheTest.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.

=== TEST ERROR OUTPUT for CookieHandlerTest ===
/net/luster/export/scratch/jsn_re/jdk/jdk1.5.0/ws/j2se/test/java/net/CookieHandl
er/CookieHandlerTest.java:90: CookieHandlerTest.MyCookieHandler is not abstract
and does not override abstract method put(java.net.URI,java.util.Map<java.lang.S
tring,java.util.List<java.lang.String>>) in java.net.CookieHandler
    static class MyCookieHandler extends CookieHandler {
           ^
Note: /net/luster/export/scratch/jsn_re/jdk/jdk1.5.0/ws/j2se/test/java/net/Cooki
eHandler/CookieHandlerTest.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
1 error