Add Keycloak dependencies

[mkuznyetsov]

What does this PR do?

Add Keycloak related dependencies

List of related CQs:

• https://dev.eclipse.org/ipzilla/show_bug.cgi?id=13864 Keycloak Servlet Filter Adapter 3.1.0.Final
• https://dev.eclipse.org/ipzilla/show_bug.cgi?id=13869 Keycloak Core 3.1.0.Final
• https://dev.eclipse.org/ipzilla/show_bug.cgi?id=13878 Keycloak Common 3.1.0.Final
• https://dev.eclipse.org/ipzilla/show_bug.cgi?id=13879 Keycloak Adapter SPI 3.1.0.Final
• https://dev.eclipse.org/ipzilla/show_bug.cgi?id=13880 Keycloak Servlet Integration 3.1.0.Final
• https://dev.eclipse.org/ipzilla/show_bug.cgi?id=13881 Keycloak Adapter Core 3.1.0.Final
• https://dev.eclipse.org/ipzilla/show_bug.cgi?id=13882 Keycloak Client Registration API 3.1.0.Final
• https://dev.eclipse.org/ipzilla/show_bug.cgi?id=13885 commons-logging 1.2
• https://dev.eclipse.org/ipzilla/show_bug.cgi?id=13886 jboss-logging 3.3.0.Final
• https://dev.eclipse.org/ipzilla/show_bug.cgi?id=13887 Apache HttpComponets HttpClient 4.5

What issues does this PR fix or reference?

eclipse-che/che#5437

[riuvshin]

@mkuznyetsov are you sure that this PR should be merged to master?

[skabashnyuk]

@mkuznyetsov can you show me dependency tree.
@riuvshin no we don't. We will now what closer to finish of feature implementation.

[riuvshin]

@skabashnyuk got it, thanks

[mkuznyetsov]

@skabashnyuk trees for dependencies

+- org.keycloak:keycloak-servlet-filter-adapter:jar:3.1.0.Final:compile
|  +- org.keycloak:keycloak-core:jar:3.1.0.Final:compile
|  |  +- org.keycloak:keycloak-common:jar:3.1.0.Final:compile
|  |  \- org.bouncycastle:bcpkix-jdk15on:jar:1.51:compile
|  +- org.keycloak:keycloak-adapter-spi:jar:3.1.0.Final:compile
|  +- org.keycloak:keycloak-servlet-adapter-spi:jar:3.1.0.Final:compile
|  |  \- org.jboss.logging:jboss-logging:jar:3.3.0.Final:compile
|  +- org.keycloak:keycloak-adapter-core:jar:3.1.0.Final:compile
|  +- org.apache.httpcomponents:httpclient:jar:4.5:compile
|  |  +- org.apache.httpcomponents:httpcore:jar:4.4.1:compile
|  |  +- commons-logging:commons-logging:jar:1.2:compile
|  |  \- commons-codec:commons-codec:jar:1.10:compile
|  +- org.bouncycastle:bcprov-jdk15on:jar:1.51:compile
|  +- com.fasterxml.jackson.core:jackson-core:jar:2.7.7:compile
|  +- com.fasterxml.jackson.core:jackson-databind:jar:2.7.7:compile
|  \- com.fasterxml.jackson.core:jackson-annotations:jar:2.7.7:compile
+- org.keycloak:keycloak-client-registration-api:jar:3.1.0.Final:compile
|  +- org.keycloak:keycloak-core:jar:3.1.0.Final:compile
|  +- org.apache.httpcomponents:httpclient:jar:4.5:compile
|  |  +- org.apache.httpcomponents:httpcore:jar:4.4.1:compile
|  |  +- commons-logging:commons-logging:jar:1.2:compile

[skabashnyuk]

I've created a new pr #57